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I tracked Amazon's Prime Day prices. We've been played

https://www.washingtonpost.com/technology/2025/10/09/amazon-prime-day-prices/
124•5555624•5h ago

Comments

A_D_E_P_T•5h ago
https://archive.ph/Wo8Z3
DDerTyp•5h ago
Obvious comment to various Amazon price trackers like https://keepa.com/
fragmede•5h ago
https://camelcamelcamel.com/
alias_neo•4h ago
Is it accurate these days? I recall there was some point where Amazon locked them out of deal prices etc, and I guess it also doesn't account for vouchers that apply at checkout?

I was looking at one of the GMKTek Ryzen AI Max boxes and it's overpriced by ~£1000 with a ~£1000 voucher to apply at checkout; or is this part of some other "scheme"?

goobatrooba•4h ago
I use these for various European Amazon (often cheaper to buy from the Amazon next door - and shipping is still free) and it's astonishing how bad they are. It's the new Amazon systems of vouchers (in € or %), temporary offers etc that these sites can't keep up with. I saw some products before prime day with a 20% voucher that were more expensive on prime day (10% reduced but no more voucher) but the price trackers showed them as cheapest ever.

Honestly at this point I compare rather with bol, idealo, guenstiger and tweakers and am then usually better off not buying from amazon.

alias_neo•4h ago
I wonder what the scheme is here though; Why overprice something by ~50% and add a voucher for the same amount off; is it some sort of anti-deal tracking thing?

It always puts me off from buying something expensive because I wonder if somehow I could end up worse off (in terms of returns, or warranty or something) because I bought something that was X but only paid Y due to the voucher.

Realistically, I probably wouldn't buy a high-end computing product from Amazon anyway, unless is was notably cheaper than the specialists I'd normally buy from. Something like a £2000+ mini PC isn't the sort of thing the typical UK PC retailers I buy from would stock.

hypercube33•2h ago
It's for the dopamine hit of "saving money" or feeling like one has, even if you haven't
nucleardog•1h ago
I think some of the "coupons" are only usable once, so could be a way to price more fairly when there's limited inventory or something?

Like you can buy one at regular price, but 2nd and beyond get marked up 100%?

scns•3h ago
Geizhals factors in vouchers.
foofoo12•2h ago
I think they were locked out during Covid. Something something stock level.

A lot of dodgy shit happened during Covid. Like Google and iOS rolling out the largest tracking network in human history. Your phone sends a Bluetooth beacon every 30 seconds and any phone in the vicinity will pick it up and vice versa. Because of Covid. Track and trace. Guess what, it's still happening.

They said only government health institutes would get access to it. Right. Right?

shellfishgene•2h ago
Why not those that track many different stores? For many things Amazon never has the best price.
Larrikin•1h ago
Can you name anything? One of the biggest complaints I've read about Amazon from the seller side is that they can be punished if they offer a better price somewhere other than Amazon.

The only items that seem to skirt this is repackaged items/junk from AliExpress, but they are or are pretending to be different companies.

zurfer•5h ago
"Amazon founder Jeff Bezos owns The Washington Post, but I review all tech with the same critical eye."

Kudos

pjc50•5h ago
I was surprised to see that. I wonder how long it'll stay up.
ahoka•5h ago
Nothing new here, communist regimes used to have party clowns on payroll to criticize the system in a controlled way.
integralid•4h ago
That's pretty rude to the journalist who wrote this article and made this analysis? What makes you think they're a clown or criticize the system "in a controlled way"?
verisimi•3h ago
I think you will have been through a pretty thorough vetting process to get to work there (private schooling, university, connections in the industry, etc)? Or do you think they are there on the merit of their writing?
antonvs•3h ago
Nepobabies such as you describe certainly exist and have “unfair” advantages, but it’s not as if all people working at such places are in that category. Merit can certainly also get you there.
verisimi•1h ago
I don't think so. Tech reporter at the WaPo? No way.
llllm•3h ago
Subscribe for 30 years and form your own opinion, it’s cosplay journalism. If you insist on thumping your chest about your independence, you become a clown.
CrociDB•3h ago
when they do, bad. when we do, nothing new.
kace91•5h ago
It’s common in the Post.

The problem isn’t that journalists don’t have what it takes to do that, the problem is that those people have been steadily resigning in protest or burning out for a while and eventually they’re all replaced.

yen223•2h ago
Imagine making money from Prime ripping people off, and then making money reporting on how Prime is ripping people off
gedy•2h ago
Reminds me of Elvis' agent selling "I Hate Elvis" buttons to make money off of them.
rokkamokka•5h ago
This is illegal in the EU, they still pulled the same shit here. Let's hope they're fined for it.
PinguTS•5h ago
Yes and no. The prices are increased about 1 month in advance. With that the average price of the last 4 weeks is increased and then you have your rebate, which is legal.
supermatt•5h ago
> that the average price of the last 4 weeks

The discount must be referenced on the LOWEST price 30 days prior to a sale, not the average.

integralid•4h ago
This still works if prices are increased a month before, right?
IshKebab•3h ago
Yeah they definitely don't keep it high for 30 days though. One or two maybe.
supermatt•3h ago
There wouldn't be much point in that, as when they promote a discount the price they compare it to would need to be the LOWEST over the previous 30 days.
IshKebab•19m ago
Yeah I guess if they were actually following that rule but they definitely aren't. It's not prime day anymore so I can't link an example but I was looking at TVs when it was prime day and specifically noticed one where there was a spike for a couple of days just before prime day and that was the discount they claimed.
supermatt•5m ago
Then please report them to your national consumer protection authority. These kinds of violations are subject to up to 4% of the annual turnover in the violated member state.
hk__2•5h ago
> With that the average price of the last 4 weeks is increased and then you have your rebate, which is legal.

It’s the lowest that count, not the average. Otherwise you could just put all items at $100k for one hour every night to put the average very high.

Ray20•4h ago
What's illegal? Changing prices? Giving discounts? As I understand it, the EU, as always, is using solutions to problems that are worse than the problems themselves.

And so, instead of a situation where the price, taking into account the fake discount, becomes, on average, a little higher on the day of the sale, we get a situation where... the price, taking into account the fake discount, becomes, on average, a little higher on the day of the sale, and much higher the whole month before that.

lm28469•4h ago
People defending megacorps and their lobbyist pulling the most abject tricks and showcasing how morally bankrupt they are will always be an enigma to me... "b-bu-but it's legal"
high_na_euv•3h ago
Manipulating the buyer that he buys something on discount when in reality it isn't?
Msurrow•3h ago
Doubling the Price of something today and then tomorrow putting it on 50% sale (at the same price as yesterday). That’s illegal in EU. As it should be.
fragmede•2h ago
TIL! https://commission.europa.eu/law/law-topic/consumer-protecti...
LunaSea•3h ago
Jeff's kiss
jmward01•5h ago
The best way to save money on prime is to not buy stuff. Seriously.
wvh•5h ago
The whole concept of buying something because it is cheap is weird.

I have a small list of items I think I will need in the near future; if it's not on that list, I'm not buying it, from anywhere, at any price. Maybe I'm a bit more ascetic than the average person, but I find it hard to imagine people just browsing lists of "cheap" stuff for hours to just buy stuff they don't need. And then being happy that they won because they paid less than some imaginary "full price".

stratocumulus0•3h ago
I know people who behave as if they had to spend money as quickly as possible every time they receive a paycheck. Their wish lists are just "ideas to spend money".
bombcar•1h ago
It’s a psychological response based on a history of inconsistency in food supply.

If you may or may not have food tomorrow, but there is a lot today, you stock up and eat.

This works great in the savanna, not so much when a trillion dollar company is using it to exploit you.

newsclues•5h ago
Only buy stuff on sale that you’d pay full price for.
amelius•4h ago
Then why have a "prime" subscription?
lm28469•4h ago
The best way to use prime is to have 10 free accounts and wait for the "hey it's been a while do you want a free prime month?" emails
ajsnigrutin•2h ago
Sometimes you need to buy stuff, because you.. well.. need it.

Need a new blender, because the old ones sounds like a woodchipper? 5 days until prime day/cyber monda/black friday/christmas sale... well, let's wait and we might get a deal. Now you know that you didn't have to wait, because you're not getting a deal.

Dusseldorf•2h ago
Well, you probably did have to wait because 5 days before the sale is when it will be artificially inflated.
bombcar•1h ago
The best part about prime day is all the other retailers trying to “match” is and actually having some good deals.
altacc•5h ago
A few years ago I moved to a country that didn't have Amazon. At first it was frustrating as I didn't know where to shop but now I see it as a benefit with some downsides. Before trips back home I'll look on Amazon for some stuff I can't get here and I'm flooded with Aliexpress junk and sponsored placements for Aliexpress junk. Amazon is hideous in so many ways.
bombcar•1h ago
Memory is a tremendous thing.

Most people (including me) perceive Amazon based on their 20-year history with it; same day delivery for free, exceptional delivery and service, good prices, etc.

But that is the past; the current reality is boring or expensive prices, crappy shipping and service tending toward shitty, and better deals to be found elsewhere; either target or Walmart on the “high” end or Temu or Aliexpress on the cheap Chinese shit end.

The most important thing for me to break the bonds was to cancel prime. Every time they try to coerce me back in strengthens my resolve to check everywhere else first.

sauwan•33m ago
Hah, I quit Prime and they just gave it back to me. No charge. I can't cancel it. I can't figure it out, but perhaps they realized that their margin on me before I canceled was well over the cost of Prime? I'm not sure, but I still only use it a fraction of what I used to...
boobsbr•5h ago
Everybody does the same on Black Friday sales.
Simulacra•5h ago
I remember reading the first serious book about Sam Walton and Walmart. Walton had this thing where he would put two bins of identical flip-flops side-by-side. One would be marked a dollar up, one would be marked a dollar down. People would always bought the cheaper, and then Walton would just shovel the flip-flops from the expensive bin to the cheaper bin. Walmart, Amazon, and just about every other retail has been playing us forever. But Amazon takes it to an art form.
tomsmeding•5h ago
I don't doubt there are interesting things in that book, but this particular one feels just so unsurprising: people are likely to notice that the flip-flops in the two bins are remarkably similar, and see that one is cheaper. They don't see a reason to buy the more expensive one so they choose the cheaper one.

It would have been more interesting had people chosen the more expensive one. There is a folk theory that you can get people to do this if you add an even more expensive option -- the "middle" option is the most attractive.

m000•2h ago
> There is a folk theory that you can get people to do this if you add an even more expensive option -- the "middle" option is the most attractive.

I don't think it's a folk theory at all. This trick is used a lot in restaurant menus/wine lists.

robocat•40m ago
> restaurant menus/wine lists

I wonder how much of that is due to the abnormal social pressure situation where your buying is public and you don't want to be seen as cheap.

A similar dynamic might occur with a bunch of people shopping together, for clothes maybe? I'm a guy that doesn't shop with others so I don't have experience here.

One bar in an upmarket area in my own town had a house wine on the menu much cheaper (I think 7 when the cheapest labeled wine might have been 14 or so). Seemed smart to me.

Although there is also some internal pressure, to not feel cheap to yourself.

For gifts the dynamics change completely since the recipient might not know the price.

modo_mario•1h ago
I assume the actual idea is that people would sometimes buy the cheaper one because the expensive option is there. A few more people would buy them than if there were just a single bin because they're thinking they're getting a good deal.
Dylan16807•3h ago
Is having two prices increasing the total sales? Otherwise I don't see the point.
glimshe•5h ago
I don't have prime and only buy from Amazon occasionally. I have nothing against them, I simply don't see the value.
thefz•4h ago
By using camelcamelcamel or keepa it's easy to spot the fake deals, who get a bump in price the day before only to get a "discount" for the promotion day.

Aside, keep a list of things you need and don't buy anything just because it's on sale.

alias_neo•4h ago
I don't buy stuff on Amazon just because it's on sale, but I do have a few things in my Wish List that I want to buy but only when they're at a price I'm happy with; many of them have been there for years.

Whenever I see a price change, and I'm not ready to buy, I add a note in the wish list notes with the current price, essentially tracking every price I see it at "by hand".

During sales I check back, and for ~90% of items in my list, they're higher not just than the lowest price I've recorded, but also many of the previously higher prices.

At this point I'm not even bothered about really ever buying much of this stuff on there, but it's fun to track the data even at a small scale like this.

echelon_musk•4h ago
Why don't you use https://camelcamelcamel.com ?
alias_neo•4h ago
I do, but I read some while ago that there was some "deal" with Amazon that prevented them from tracking real sale prices, and it also can't account for voucher codes that apply at checkout.

I'm not sure if the former still stands, but on the whole, I've found CCC doesn't always have the actual best price I've recorded.

jasode•3h ago
I also use that 3 humps website regularly but they actually don't closely track fast changing prices day-by-day for all items. Therefore, I also track price changes manually myself.

E.g. this ant insecticide was recently on sale for $15.99 during Oct 7 & 8 and yet that lower price was invisible to camelcamelcamel: https://camelcamelcamel.com/Miller-8150120-24-Ounce-Disconti...

Those blind spots happen for many items and my reverse-engineering guess is that they simply don't have the compute infrastructure to track/scrape all the millions of ASINs. Therefore, many price changes are completely missed. I'm sure they're doing the best they can but it seems like the only 100% accurate way to track price change history is for Amazon.com itself to offer it. Amazon likes to say they're "customer-oriented" and providing an official price history dashboard would help shoppers.

squidbeak•3h ago
You can just leave these items in your basket. You'll receive a notification whenever the price changes.
ycuser2•2h ago
That's the reason I don't have scruples to scam Amazon by saying that I haven't received the package when the deliverer just throw it in the first stock of the apartment building without giving notice.
toofy•4h ago
ive said it before and at the risk of sounding repetitive:

ive almost entirely stopped shopping online. it was rough at first, particularly since i kind of fell out of the loop on which stores carry what, but once i mostly figured that out its honestly so much nicer.

almost all of my christmas gifts were done at actual stores. and just everyday shit like random car lights to clothes to picture frames to bookshelves to random little gifts to journal notebooks, etc... its been such an improvement.

i kept finding myself sending back ridiculous amounts of stuff because the pictures and descriptions were either outright misleading, outright lying, or i just wouldnt read close enough. its pretty rad to hold the item in your hand, know exactly the size, the weight, feeling, color, material, etc... and just know you're getting exactly what you want right now in the exact moment.

and the thing that surprised me the most? how much i actually enjoy people. i know it sounds entirely ridiculous but even just being helped by someone or checked out by a person felt right. ive never been an anti-social or anxious person, ive always had regular social life with friends and coworkers, but shopping with real people was working a social muscle that i hadn't realized was atrophying so badly.

and it gave me an excuse to get out of the house often for something other than work or partying.

anyway, of course amazon was going to go this way, we see it over and over and over again. none of us are shocked.

TheChaplain•4h ago
Think what you will about Amazon, but they proved their usefulness to me last week.

It was two days before a birthday and I needed a present, which interestingly was as unusual as a spotting scope. I found it on Amazon, paid a tiny amount extra for express delivery, and it arrived the next day at lunch time. Fully functional, no scams or trickery.

Before I bought it, I checked with all shops in mine and nearby cities, no luck. I went on PriceRunner, where the cheapest option was 30% more expensive and everyone had (at best) 3-5 days delivery. Then as a last check, I went on Amazon.

I don't love Amazon, there seem to be a lot of things that doesn't seem right. Plus they easily push out small shops everywhere.

But they do deliver.

philipallstar•4h ago
Indeed. I don't really see all the problems people have with it. It's not perfect but it's extremely reliable on average.
lopis•3h ago
Human rights violations and unfair business practices. But other than that they are great.
pedrogpimenta•4h ago
I agree. I would just like that they didn't have to exploit workers. It seems something that could be done. Have more people taking smaller or less frenetic shifts and pay them the same or more. It can be doable, seeing the amount of money Bezos amasses, right? I love the service but despise how the workers are treated. And nothing compares, there's no real competition.
olelele•1h ago
The whole point of Amazon is to extract as much wealth as possible from everything and everyone except bezos. Thousands of people breaking themselves so he can go to space. Just like the olden robber barons.
gorbachev•3h ago
The reason you can only find things in Amazon is that they've driven all other vendors out.
theshrike79•4h ago
Psychological tip (and maybe an idea for a browser extension?):

- Never look at the sale percentage, just look at the price.

Yes, it might be "75% off!!", but is it still worth 200€ to you?

It takes some mental trickery and fortitude to drag your mind away from the "OMG IT WAS 800€ and now it's only 200!!" and only look at the current price vs features.

b3lvedere•4h ago
I taught my children how to interpret some discounts.

"Dad! It says here the 2nd item is 50% off! That's a bargain!" "So, what are you actually paying in total compared to the original price in total? And do you really need that 2nd item?"

refactor_master•3h ago
In relation to this, I really hate the South Korean convenience stores’ aggressive 2-for-1 on many of the most basic things, because you know you’re essentially being forced into buying the second item you didn’t need.
jmlim00•3h ago
I’ve heard that if you use the convenience store’s app, you can just take one and“save” the extra item for free pickup at a later time. Never verified it myself though.
grues-dinner•2h ago
So an interest-free loan to the store, plus a penalty if you don't make a return visit.

Then again, is food is inflating faster than the interest rates, then you could still come out ahead!

gruez•1h ago
>So an interest-free loan to the store

Unless you're not coming back for months, the "interest" you lost is under one cent and not worth worrying about

grues-dinner•1h ago
Multiplied by all customers, it could be quite a bit. It's may be better than having to take both items home and wasting one, but I bet the accountants are quite happy about their little free money fund.

It's also quite a "safe" loan to have because not only is it free to hold, you're probably never going to need to repay it all at once.

gruez•16m ago
>It's may be better than having to take both items home and wasting one,

???

How is taking both items home, possibly wasting one, better than taking one home, and taking the other in a few weeks and having no wastage? You're just hurting yourself (by possibly wasting an item) just to deny business some fraction of a cent worth of interest, which in ironic given that convenience stores are high margin businesses and you're choosing to buy from them in the first place. Whatever margin they made on the sale far exceeds any "interest-free loan" you gave them.

rightbyte•3h ago
I would extend that to packs of sausages and whatever. The price of a sausage varies wildly with how well package size and amount of dinner guests matches ...
andy99•3h ago
We have this in Canada as well. I generally either don’t buy it at all or if I really need to do so begrudgingly and go somewhere else next time.
anticorporate•2h ago
Some places regulate this better. "Buy one get one" is what is sounds like, "2 for $x" means you can, by law, get one for half that price. Unfortunately, even in places that such laws exist, retailers don't know this and it's poorly enforced.
gruez•1h ago
>"2 for $x" means you can, by law, get one for half that price

Isn't that pretty easy to get around with better wording? eg. "2 for $x, min 2"

arealaccount•1h ago
It doesn't seem to happen where I live. They don't advertise that you can just buy one, but if you buy one instead of two it's always 50% off.
xtiansimon•2h ago
South Korea, US, all the same in this regard.

When I lived in a tiny apartment, and had a tight budget, I felt completely unseen at the supermarket—I have no place for the surplus, and to get the discount I have significantly increase my spend. Thank goodness for “dollar stores”, who shift the other way to decrease the items value to keep it at the same price point (ie. 1/2-sheet paper towels in single packs).

foofoo12•2h ago
Many years ago I was helping a friend making sense of offers he'd had for his company's computer system. He was buying new PCs.

The offers all fulfilled the requirements. But he was so keen to taking the highest offer because it has a MASSIVE discount applied.

Even when I told him, that he, as a business owner new exactly how discounts works. He sheepishly admitted that. He went for the highest offer.

jimnotgym•4h ago
I feel like my move to Amazon over the last 25 years has been little to do with price and more a symptom of my lack of free time when shops are open. I simply can't get to most physical stores during the week. And my weekends are rammed with all the things I didn't get to do during the week...

Then there is the issue of what physical stores have done to become more competitive. In many cases they have reduced their range. So now I'm worried that they simply won't have what I need.

steveBK123•2h ago
Yes a lot of urban retail seems to be in a death loop.

Between online competition, wages, rent and shoplifting you see fewer locations, with a less convenient shopping experience, less staff and shorter hours.

Which only leads to more Amazon usage.

ChildOfChaos•4h ago
It's about convivence. It's not been about big ticket items for me on such days lately, but more to stock up on essentials, prime day is a day I can assure they are usually all on 'offer' at the same time so it makes it easy to do a large order of everything and stock up.

Sure, might not be the absolute best price of the year, but it's a decent price for everything all at the same time, with the odd bigger ticket stuff if a real deal exists.

This year I bought a lot of household items, toiletries and even a few food cupboard items, all of which according to price tracker plugins are about the lowest they get to, even if they go that price sometimes throughout the year, it's a great time to do one big shop and not have to deal with the pain of receiving so many deliveries.

I don't see it as an issue, what amazon does is what everyone else does on their sales, you just need to do your research and stay aware, like with anything.

kotaKat•4h ago
These events are just so tiring and exhausting in the public eye.

First it was Prime Day. Now it’s Prime Big Deal Days. Then all the other retailers have to jump on “deal week” and “deal day” campaigns and equally make a bunch of loud, useless noise for sales that have little to no actual discount.

Anyone else up for some sales fatigue?

TrianguloY•3h ago
I've always wondered what would happen with a shop that never has sales. A shop where the prices are always the same, although they may occasionally increase them due to inflation, etc.

Such a shop will not get the surge of "oh look a discount, let me buy it" consumers, but people will probably realize that this way when you need something you can buy it on the spot, and it will always have the best price no matter when.

Does a shop like this exist, or existed?

jasode•3h ago
>I've always wondered what would happen with a shop that never has sales. A shop where the prices are always the same, [...] Does a shop like this exist, or existed?

An ex-Apple executive who ran the Apple retail stores tried that strategy with JC Penney and it didn't work:

https://www.google.com/search?q=jc+penny+everyday+low+price+...

Dylan16807•3h ago
It's a useful case study, but without a memory erasing device changing strategy like that is different from being a shop that truly never has sales.
barney54•3h ago
I don’t know of a shop that doesn’t have some sales at some time. Sales are just such powerful selling tools.

Factorio is a counter example. Factorio never goes on sale, which is kind of nice because when you buy it you know you couldn’t have gotten a better price, but without sales you aren’t as motivated to buy it for a lower price than usual.

brorfred•3h ago
I think Trader Joe's is as close as you get to it?
pjc50•3h ago
Costco are pretty unobtrusive with their discounts. They have random coupons on things, but only for a small amount. Except, of course, for the famous inflation proofed loss leader $1.50 (£1.50 in the UK) hot dog.
wasmitnetzen•3h ago
German home improvement/hardware store chain Hornbach does that.[1] They still run ads though, quite aggressively.

[1]: https://www.hornbach.de/services/die-hornbach-dauertiefpreis...

averageRoyalty•2h ago
I don't know what country you're in, but most normal shops I see work exactly that way. Some have sales once or twice a year, but most don't.
Spooky23•2h ago
It only works for things that are price inelastic. Usually luxury or more high end products. Good examples are Rolex, Apple, Sony in the old days.

Otherwise price is elastic and using price change to tweak sales when demand slacks or oversupply exists is smart business.

robocat•55m ago
Elasticity occurs in a competitive market with variable prices - it is a property that is measured as demand and supply vary.

When a monopoly manufacturer sets the price of a good that has no equivalent, talking about elasticity makes no sense.

Der_Einzige•1h ago
Lots of shops run similarly to this in American/canadian/Japanese made men’s fashion. Example stores include Self edge, standard and strange, brave star selvedge, whites and nicks boots, etc only use sales for items that have small defects, were returns, etc.

It’s nice to see brands which refuse to play by fast fashions games and who sell their products based on their quality.

Of course, these brands will often takes weeks or months to get you your item due to the waitlists. You can’t even get on the waitlist for a ship John 24 ox Willis waxed canvas jacket because they’re back ordered 6+ months.

CptanPanic•1h ago
This is Trader Joes
bombcar•1h ago
Business oriented stores can run this way. Places like McMaster Carr?

Walmart tried to advertise this for decades as “always low prices” which worked pretty well, but even they have clearance (need to rotate shelf space or excess inventory) and rollbacks (price matching someone somewhere).

They do not have Kohls style “50% off everything if you jump through these hoops”.

IshKebab•3h ago
No shit. Honestly if you aren't using one of those price tracking extensions on Amazon you're doing it wrong. I use Keepa.

It's amazing how many product prices are now a square wave. Look at this for example and feel sorry for the people that paid £100.

https://keepa.com/#!product/2-B0DNG35BVM

Often they are even more predictable and switch between the high and low price every two weeks. I have no idea why. Here's an example:

https://keepa.com/#!product/2-B08W241HPW

Anyway if you browse with one of these extensions on Prime day it's very obvious how much of a lie their deals are. They're usually the lowest price that something has been available, but also usually they've been at that price before in the last few months.

rightbyte•2h ago
> Often they are even more predictable and switch between the high and low price every two weeks. I have no idea why. Here's an example:

Maybe they raise prices as stock almost depletes before next delivery?

Or to calibrate the price by noting sales at different prices?

IshKebab•21m ago
That explains why the price changes but it doesn't explain why it is a perfect square wave.
gorbachev•3h ago
This is why I never buy anything from Amazon unless I track prices in one of two ways:

1. camelcamelcamel.com 2. Add the product in my shopping cart and follow the price movement until I see the price drop down enough

Havoc•3h ago
Just copy the link into camelcamelcamel and look at the price history
antonvs•3h ago
“We”?

I suppose the author is one of today’s lucky 10,000.

foofoo12•2h ago
https://archive.is/Wo8Z3
The-Old-Hacker•2h ago
Amazon Prime is a capitalist's wet dream. You give a company money every month whether you buy something from them or not. And because you now have a sunk cost, you are motivated to buy from Amazon even if their prices aren't the best value.
skywhopper•2h ago
I love that we get these articles every year exposing how Amazon manipulates pricing to make Prime Day seem like a sale when it rarely is, but no one (at least no reporters) ever seem to remember.
TheCraiggers•2h ago
I first found out it was prime day when I went to check out and was notified that 4 out of 5 things placed in the cart over the week had suddenly jumped in price overnight. So, "can confirm".
red-iron-pine•1h ago
I mean of course you have, capitalism isn't interested in actually making things cheaper for people, just extracting value.

lower prices are just a consequence of competitive entities in a marketplace jockeying for advantage. the second they don't need to do that they will raise prices and screw the average consumer and we've seen it again and again.

maxglute•24m ago
Best sale around prime day warehouse are sales from returns after. I feel like whoever is grading the returns quality slip due to all volume and chance of scoring basically new items for steep discounts is up.
speedylight•18m ago
Shopping on Amazon is a nightmare because it’s filled with Chinese crap and untrustworthy reviews, I almost always have to put several search filters just to see semi-reputable brands.
switchers•17m ago
The camelcamelcamel site is always my go to for "is this actually a deal" on Amazon. There's also an extension called keepa that will draw the graph on the Amazon website for you.

Igalia, Servo, and the Sovereign Tech Fund

https://www.igalia.com/2025/10/09/Igalia,-Servo,-and-the-Sovereign-Tech-Fund.html
100•robin_reala•1h ago•10 comments

Show HN: I invented a new generative model and got accepted to ICLR

https://discrete-distribution-networks.github.io/
191•diyer22•5h ago•23 comments

OpenGL is getting mesh shaders as well, via GL_EXT_mesh_shader

https://www.supergoodcode.com/mesh-shaders-in-the-current-year/
23•pjmlp•2h ago•2 comments

PSA: Always use a separate domain for user content

https://www.statichost.eu/blog/google-safe-browsing/
54•ericselin•49m ago•46 comments

A small number of samples can poison LLMs of any size

https://www.anthropic.com/research/small-samples-poison
1015•meetpateltech•22h ago•383 comments

Ohno Type School

https://ohnotype.co/blog/ohno-type-school-a
73•tobr•4d ago•28 comments

My approach to building large technical projects (2023)

https://mitchellh.com/writing/building-large-technical-projects
216•mad2021•10h ago•29 comments

Htmx, Datastar, Greedy Developer

https://drshapeless.com/blog/posts/htmx,-datastar,-greedy-developer.html
24•KolmogorovComp•3h ago•2 comments

I Switched from Htmx to Datastar

https://everydaysuperpowers.dev/articles/why-i-switched-from-htmx-to-datastar/
205•ksec•7h ago•135 comments

Parallelizing Cellular Automata with WebGPU Compute Shaders

https://vectrx.substack.com/p/webgpu-cellular-automata
34•ibobev•4h ago•3 comments

Weave (YC W25) is hiring a founding AI engineer

https://www.ycombinator.com/companies/weave-3/jobs/SqFnIFE-founding-ai-engineer
1•adchurch•2h ago

Python 3.14 is here. How fast is it?

https://blog.miguelgrinberg.com/post/python-3-14-is-here-how-fast-is-it
629•pjmlp•1d ago•451 comments

Nobel Peace Prize 2025: María Corina Machado

https://www.nobelprize.org/prizes/peace/2025/summary/
376•pykello•5h ago•366 comments

Bringing Desktop Linux GUIs to Android: The Next Step in Graphical App Support

https://www.linuxjournal.com/content/bringing-desktop-linux-guis-android-next-step-graphical-app-...
9•sipofwater•3h ago•4 comments

Static Bundle Object: Modernizing Static Linking

https://medium.com/@eyal.itkin/static-bundle-object-modernizing-static-linking-f1be36175064
18•ingve•2d ago•10 comments

Examples Are the Best Documentation

https://rakhim.exotext.com/examples-are-the-best-documentation
253•Bogdanp•18h ago•88 comments

My first contribution to Linux

https://vkoskiv.com/first-linux-patch/
612•vkoskiv•4d ago•72 comments

An MVCC-like columnar table on S3 with constant-time deletes

https://www.shayon.dev/post/2025/277/an-mvcc-like-columnar-table-on-s3-with-constant-time-deletes/
15•shayonj•3d ago•1 comments

A Story About Bypassing Air Canada's In-Flight Network Restrictions

https://ramsayleung.github.io/en/post/2025/a_story_about_bypassing_air_canadas_in-flight_network_...
72•samray•6h ago•56 comments

The Prairie Farmers Preserving the Most Threatened Ecosystem – Forever

https://reasonstobecheerful.world/prairie-farmers-preserve-most-threatened-ecosystem-forever/
6•PaulHoule•18m ago•0 comments

Multi-Core by Default

https://www.rfleury.com/p/multi-core-by-default
45•kruuuder•7h ago•18 comments

Figure 03, our 3rd generation humanoid robot

https://www.figure.ai/news/introducing-figure-03
370•lairv•1d ago•364 comments

Show HN: I've built a tiny hand-held keyboard

https://github.com/mafik/keyer
362•mafik•22h ago•99 comments

LLMs are mortally terrified of exceptions

https://twitter.com/karpathy/status/1976077806443569355
271•nought•21h ago•122 comments

A built-in 'off switch' to stop persistent pain

https://penntoday.upenn.edu/news/select-neurons-brainstem-may-hold-key-treating-chronic-pain
180•gmays•17h ago•80 comments

Origami Patterns Solve a Major Physics Riddle

https://www.quantamagazine.org/origami-patterns-solve-a-major-physics-riddle-20251006/
4•westurner•3d ago•0 comments

Subway Builder: A realistic subway simulation game

https://www.subwaybuilder.com/
269•0xbeefcab•20h ago•116 comments

A beginner's guide to deploying LLMs with AMD on Windows using PyTorch

https://gpuopen.com/learn/pytorch-windows-amd-llm-guide/
92•beckford•4d ago•26 comments

Interactive Double Pendulum Playground

https://theabbie.github.io/DoublePendulum/
52•melector•2d ago•18 comments

ScribeOCR – Web interface for recognizing text, OCR, & creating digitized docs

https://github.com/scribeocr/scribeocr
90•atomicnature•4d ago•13 comments