I run a site which scrapes MiniPC prices from several stores every day. I was excited for the AliExpress 11.11 sale (their version of black friday) thinking there would be good deals to scoop up, or at least show on my site. But while they make it look like an impressive sale, stores just quietly delisted, relisted, renamed, and up prices over the last week or two. Quite a trick! Luckily since I normalize all entries into their composing specs (CPU, RAM, Disk, etc) it's much easier to track despite these tricks.