frontpage.
newsnewestaskshowjobs

Made with ♥ by @iamnishanth

Open Source @Github

fp.

Open in hackernews

eBay explicitly bans AI "buy for me" agents in user agreement update

https://www.valueaddedresource.net/ebay-bans-ai-agents-updates-arbitration-user-agreement-feb-2026/
76•bdcravens•1h ago

Comments

advisedwang•1h ago
LLM-initiated purchases probably rack up chargebacks, support calls, etc for mistakes the LLM makes. I'm not surprised they want to limit it.
doctoboggan•1h ago
More likely, they want to be the exclusive provider of LLMs that can purchase off of eBay, or at least charge for API access.
rvnx•1h ago
This; "certified / authorized by eBay" and then agents have to pay access to the catalogue
nxobject•59m ago
They may have an inkling that the big LLM companies will want to pay for future/past data... I imagine either Google or OpenAI has something predictive and shopping-related in the books.
lukev•1h ago
Right -- this seems more of a protective measure than something they will proactively enforce.

If you have a well-behaved agent that uses a browser to buy on eBay, I doubt that will cause issues. But if it leads to issues, they can point to that clause instead of having to help repair the issues caused by someone else's software.

jsheard•1h ago
I might be out of the loop, but are agents actually out there buying stuff from "unwilling" vendors at any significant scale? I thought that was still mostly limited to opt-in partnerships with retailers. Still, eBay might be anticipating the issues you mentioned and trying to get ahead of them.
Nkharrl•57m ago
Not commonly known (I work in this space), but yes.

Agents are being used to automate things like non-cash account balance arbitrage, stacking and abusing marketing promotions, triangulated purchasing schemes, and purchase-refund arbitrage schemes at an increasingly large scale.

yieldcrv•1h ago
not the User Agreement!

Impossible to enforce, they can read browser windows and pass captchas

wobblyasp•1h ago
Probably less about direct enforcement, more about after the fact. Ebay doesn't want to deal with charge backs for hallucinate purchases
petcat•1h ago
Yeah, they're hedging against "AI purchases". eBay has already been dealing with automated/bots for years.
mandeepj•1h ago
> Ebay doesn't want to deal with charge backs for hallucinate purchases

A charge back doesn’t mean buyer always wins. Imagine if credit card companies also pass a rule - “LLM or AI purchases are non-refundable”.

On a different note - once I tried to cancel an eBay order within a minute, both eBay and seller declined. It’s so fked up with them.

drum55•1h ago
eBay is hyper aggressive about fingerprinting, they will catch things like it trivially. Browsers leak all sorts of information like what sockets are open on localhost, making yourself look like an actual person is very challenging to someone motivated to detect you.
Nextgrid•12m ago
LLMs don't need browser automation though. Multimodal models with vision input can operate a real computer with "real" user inputs over USB, where the computer itself returns a real, plausible browser fingerprint because it is a real browser being operated by something that behaves humanly.
lo_zamoyski•59m ago
> Impossible to enforce

Maybe, but a policy's or law's validity or importance are not contingent on them being enforceable.

drnick1•43m ago
This. These kinds of "rules" are basically useless because they are not enforceable. It's exactly like having speed limits but no cops.
whyenot•1h ago
So scraping bots and “buy for me” bots are bad, but the incredibly annoying sniping bots are OK? That sure feels like a double standard.
theamk•1h ago
sniping bots keep people on ebay.com
jader201•59m ago
I think AI is going to level the playing field with all these bots that have been used for things like this (including scalpers for those low supply/high demand items), and retailers will (hopefully) have no choice but to address the issue once everyone starts to use/abuse them.

I can only hope.

jsheard•52m ago
What's the point of sniping bots when eBay has automatic bidding? Counter-sniping is essentially built-in, if your price ceiling is higher then a snipers then you're guaranteed to win even if they bid at the last millisecond.
noman-land•46m ago
The act of bidding itself shows interest and raises the price.
pishpash•41m ago
Auto bid raises the price to the second highest price among auto bidders, basically running an instant second-price auction. Sniping avoids running these pre-close auctions.
CompuHacker•41m ago
The act of viewing the item page in itself demonstrates activity and is relayed to other users; leaking information about, not necessarily intent, but awareness. If you want something, figure out the details without actually clicking on it.
pishpash•44m ago
Auto bid isn't the same as sniping. Sniping hides information about demand. Auto bid can't hide information as soon as there is another bidder.
dingaling•32m ago
Establishing the price ceiling is difficult, though. You might arbitrarily set it as $23, but be sniped at $23.30. The sniper bot only needs to bid that small increment over your arbitrary ceiling.

Can you really say that $23 was your hard limit, or would you have paid $23.40? Unless you're buying something also available at retail, nobody can be that accurate in foresight.

Sniping removes the 'contemplation window' to reconsider your bid.

ryandrake•27m ago
Then just put your actual hard limit in as your bid, and sleep soundly, knowing that if someone pays $0.01 more, it's OK because you wouldn't have wanted to pay that anyway.

I've never really been bothered by "sniping" in eBay. I always bid my absolute 100% maximum, and if someone bids more than me, then they can have it.

bena•13m ago
It gets into the nature of "Which grain of sand makes it a pile?"

Knowing people bid snipe by bidding one cent over whole dollars, would you consistently bid two cents over if it meant you would win more of your auctions?

One cent is negligible. If you asked me if I would have paid $10.01 instead of $10.00, I'd probably say "Sure". $10.02? $10.03? Like, where does the line get drawn?

And then you come at it from the other way. Let's say I'd pay $10, but not $11. But what about $10.50? $10.25? Or we can go down by pennies again.

I agree, put in your limit and walk away. If you get overbid, even by a cent, don't sweat it. That's the game. But I can see why people get frustrated when they lose an auction by one cent.

pwg•7m ago
From what I understand, the reasoning behind the snipe method of bidding is to avoid showing to other bidders that there is interest, leading to the, supposed, outcome of more likely being the only bidder and thereby receiving the item at the sellers starting bid price (or slightly above) rather than at the "max one was willing to pay" price.
nutjob2•2m ago
Sniping is the only way to bid for two reasons:

- bidding more than once and allowing time for others to counter bid drives up the price through competition for the item. Sniping also removes the temptation to counter bid, rather than to stick to your maximum bid.

- not sniping allows the seller to do ghost bidding, letting them discover your maximum price (including counter bidding). Here someone always out bid you (the ghost bidder) but the seller says the winner didn't complete the sale so offers it to you at your highest bid.

pishpash•52m ago
Scraping and buy for me bots cut out eBay. Sniping bots don't.
j45•48m ago
This was my thought as well, sniping bots have been around for as long as ebay has. Perhaps though, the sniping bots don't cause as much load on ebay's infrastructure?
BeetleB•38m ago
I never understood why eBay set things up to enable sniping.

Many years ago, there was an auction site called uBid. They had the sane rule: Bidding is open as long as there have been bids in the past 5 minutes.

So the end date could be January 24th, 3pm, but if someone bids at 2:58pm, the deadline is extended to 3:05pm. And it keeps going.

You know, like how auctions in the real world work.

pishpash•33m ago
There is no need for that. They only need to implement a closing auction like stock markets. But eBay hasn't done anything since the 1990's except raise fees.
iLoveOncall•28m ago
> But eBay hasn't done anything since the 1990's except raise fees.

Meanwhile it's now 100% free to sell on eBay for non-professional sellers.

https://www.ebay.co.uk/help/selling/fees-credits-invoices/fe...

jsheard•15m ago
That's semantic sleight of hand, they replaced the "seller fee" with a "buyer protection fee" which is transparently bundled into the sale price. Either way the seller ends up with less money than they sold the item for.

Before: Buyer pays £100, seller receives £100, seller later billed £5 fees.

After: Buyer pays £100, eBay pockets £5 protection fee, seller receives £95.

pwg•14m ago
> it's now 100% free to sell

Nice:

> You won't pay final value fees or regulatory operating fees

Of course, they will likely find some other way to extract their fees.

It would be nice, however, if the final value fee went away for US non-professional sellers.

There does seem to be no indication (at least on the page you linked) of how they define "private seller", which also opens up the possibility of them defining it so narrowly that, say, only five UK residents ever qualify.

kotaKat•10m ago
Only in the UK, and only on "private sellers". eBay is losing a lot of marketshare in the UK so they've taken drastic measures to try to get people listing again.
pwg•24m ago
Another eBay precursor auction side, onsale.com, had the same setup. The auction ended at X date/time or five or ten minutes (I forget which) after the last bid was made.
gpt5•20m ago
Guessing here - but they are probably relying on game theory / auction theory. They have a built in "sniping bot" - by allowing you to type your highest price, and it will auto-bid for you until that price.

The fear of being sniped encourages you to bid your maximum value, and not just wait and see if you can sneak in a lower bid. This is what all auction sites want.

postalrat•13m ago
Except nobody uses it that way. Auctions are rare themselves. Sellers dont like it, buyers dont like it yet ebay won't change it.
cjbgkagh•7m ago
People will pay a premium to win, not everyone but enough to make it worth it.
mkl•9m ago
This how Trade Me (NZ auction site) works: any bid in the last 2 minutes delays the close time to 2 minutes after the bid. That can happen repeatedly, and I've seen it go on for over 20 minutes on highly contended auctions. It works well.
Retr0id•21m ago
I've bought hundreds of things on ebay over the years and I've never understood the issue with "sniping".

Sure, I've been outbid at the last moment. Losing an auction is always a little frustrating. But if I was willing to pay that price I should have bid it myself. Feels fair enough?

tkzed49•17m ago
why would you bid the highest price you can afford in an auction? the seller agreed to auction the thing; they could have just offered it for a set price.
HotHotLava•12m ago
Do you not know how ebay works? You put in the maximum price you're willing to pay, and if you win you're paying 2nd highest bid + 1. So you don't save any money by starting with a low bid.
gnopgnip•8m ago
Buy for me bots results in more returns, cancellations, item not as described and other problems ebay and sellers have to deal with
downrightmike•57m ago
No one wants AI to spend their money, checked or not. The few people who would want AI, want AI to save them money
subroutine•56m ago
What is the use case for LLM agent shoppers? I can't imagine delegating the purchase of a used item to an AI (I'd be okay with AI identifying the best deals for me to review). This must be something for people who are doing something at scale like flipping items on Ebay or drop shipping.

I imagine this type of automation existed before LLM agents came along - what do they add? Is it just the ability to evaluate the product description? Item quality is already listed as a categorical variable.

akersten•54m ago
Does it need a known and enumerated use case to be allowed? I don't like that implication.

An AI that shops for a blind user, for one free example of the untold and unexplored uses of new technology.

pishpash•39m ago
How do ticket scalpers make money? It's an automation war. You can run arbitrage strategies at scale if you can scrape markets with bots that understand unstructured data. Even if trades go wrong sometimes it can be profitable on average.
observationist•38m ago
"Hey, ChatGPT/Grok/GeneriBot4000, please watch for a great deal on a 1982 stratocaster guitar - must be in good or better condition, $600 or less, and if you see it, go ahead and buy it without confirmation"

Ongoing tasks, arbitrage for mispriced postings in ways that aren't currently exploited that LLMs make feasible - by banning auto-buy, maybe they're attempting to delineate between human seeming behavior and automation, and giving AI permission to buy looks too much like a real person?

Seems pretty petty to me.

subroutine•17m ago
Yeah I guess that makes sense for some people. I'm just not in a financial position where I'd let an AI buy a $600 used guitar without me every having seen it.
dawnerd•10m ago
Yeah literally price mistakes being picked up right away. But also seems like a good way to get scammed.
some_random•23m ago
"Hey ChatGPT I want to build my own personal cloud storage computer, buy all the hardware for me then walk me through building and configuring it. My budget is $600, try to get the best deals and make sure that all the parts are compatible. I'm fine with used parts as long as they're a good deal and are in working order."
subroutine•13m ago
You would really do this? You'd not even want to at least briefly review the cart before making a $600 purchase of used computer hardware?
WarmWash•7m ago
"Hey ChatGPT, I need more glass cleaner"

*OpenAI issues a micro auction to glass cleaner companies and distributors to see who will bid the highest combined commision*

"Sure thing! I ordered some Glass Clean Plus from Target for you!"

Terr_•4m ago
[delayed]
estimator7292•33m ago
Hasn't eBay's traffic been 80% bots since day one? I haven't participated in an auction in forever because even 20 years ago you were guaranteed to get sniped by a bot on anything except actual garbage.
dankwizard•4m ago
Tried selling on eBay as a regular Joe lately? Item sold for roughly $190 and I lost $45 in fees - I didn't even have a premium ad or pay for any of the boosting.

No wonder Facebook marketplace has destroyed them

Take potentially dangerous PDFs, and convert them to safe PDFs

https://github.com/freedomofpress/dangerzone
2•dp-hackernews•6m ago•1 comments

Where I find free game assets (compiled my go-to sources)

https://assethoard.com/blog/where-to-find-free-game-assets-2026
1•markyg•8m ago•1 comments

Impact of AI on the 2025 Software Engineering Job Market (2025)

https://www.sundeepteki.org/advice
1•lopespm•10m ago•0 comments

Fiat Lux – UFO Religion

https://en.wikipedia.org/wiki/Fiat_Lux_(UFO_religion)
1•dmonay•14m ago•0 comments

Gemini AI assistant tricked into leaking Google Calendar data

https://www.bleepingcomputer.com/news/security/gemini-ai-assistant-tricked-into-leaking-google-ca...
1•greyadept•15m ago•0 comments

Ask HN: Motion Blur Detector Library/Package

1•notlikeus•17m ago•0 comments

Show HN: ShipShared – Breaking the "distribution wall" for micro-SaaS

https://shipshared.link
1•markyd•18m ago•0 comments

Brain on ChatGPT: Accumulation of Cognitive Debt When Using an AI Assistant

https://www.media.mit.edu/publications/your-brain-on-chatgpt/
2•misswaterfairy•18m ago•1 comments

Show HN Guidelines

https://news.ycombinator.com/yli.html
2•cjbarber•20m ago•0 comments

Show HN: Squadsure a free tool for volunteer sports committees

https://squadsure.com
1•chocoboaus3•21m ago•0 comments

PassLLM – World's most accurate AI-based password guesser

https://github.com/Tzohar/PassLLM
1•Plarsy•27m ago•1 comments

Show HN: Syntux - build generative UIs for the web.

https://www.getsyntux.com/
2•TheDever•29m ago•0 comments

Hacking WhiteDate [video]

https://www.youtube.com/watch?v=lJsS8lqCpwU
1•subjektivation•30m ago•0 comments

RadOps is a multi-agent platform for automated DevOps workflows

https://github.com/mehrdadrad/radops
1•mehrdadrad•30m ago•0 comments

The surprising windfall that airlines could reap from weight-loss drugs

https://www.washingtonpost.com/transportation/2026/01/21/weight-loss-drugs-airlines-fuel-savings/
3•bookofjoe•32m ago•1 comments

Lords defy Government with crushing vote to ban social media for under-16s

https://www.upday.com/uk/politics/lords-defy-government-with-crushing-vote-to-ban-social-media-fo...
2•chrisjj•33m ago•1 comments

Microsoft's Nadella: AI needs 'social permission' to consume so much energy

https://www.politico.com/news/2025/12/01/microsofts-nadella-says-ai-must-earn-social-permission-t...
1•cstever•38m ago•2 comments

Delay / Disruption Tolerant Networking for deep space communications

https://www.nasa.gov/communicating-with-missions/delay-disruption-tolerant-networking/
1•voxadam•38m ago•0 comments

The Future of Development: Running Firecracker MicroVMs on Your MacBook Pro M3

https://u3n.medium.com/the-future-of-development-is-here-running-firecracker-microvms-on-your-mac...
2•thenaturalist•41m ago•0 comments

After 40 years, Nintendo's Kensuke Tanabe is retiring

https://hanafuda.report/articles/kensuke-tanabe-is-retiring-here-are-all-the-nintendo-games-he-ha...
3•brandrick•44m ago•0 comments

Shiseido's Fall and Did You Know China Has an Industrial Policy for Lipstick?

https://www.governance.fyi/p/shiseidos-fall-japanese-cosmetics
6•guardianbob•45m ago•0 comments

Email from Family in Minnesota

https://inessential.com/2026/01/21/email-from-minnesota-family.html
10•tastyface•45m ago•0 comments

Lynx R2 Mixed Reality Headset

https://lynx-r.com/
1•LorenDB•45m ago•0 comments

Long-Term InSAR Monitoring of Groundwater: Insights from the Hollywood Basin

https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024WR039161
1•PaulHoule•46m ago•0 comments

Show HN: A distribution-first incubator for solo and small-team B2C apps

https://twitter.com/clover_ye/status/2014096525836566979
1•tuye0305•48m ago•0 comments

I built a multi-touch attribution engine that detects ChatGPT and "Dark" traffic

https://www.Zyro.world/
1•edwardglush•49m ago•2 comments

The Battle for One of the Richest and Smallest Counties in Texas

https://www.newyorker.com/news/letter-from-the-southwest/the-battle-for-one-of-the-richest-and-sm...
3•coloneltcb•50m ago•1 comments

I built a new type of erasure code using Bloom filters

https://lumramabaja.com/posts/let-it-bloom-the-seeds-of-information-chaining-part-1/
3•birdculture•50m ago•0 comments

A Framework for Ethical Decision Making – Markkula Center for Applied Ethics [pdf]

https://cse.sc.edu/~mgv/csce390f23/MarkkulaFramework.pdf
2•shrewdcomputer•53m ago•0 comments

Immigration officers assert power to enter homes without a warrant

https://apnews.com/article/ice-arrests-warrants-minneapolis-trump-00d0ab0338e82341fd91b160758aeb2d
10•duxup•53m ago•6 comments