Things like this is hardly why I bother with eBay. I'm quite fortunate to be able to just go to places that use test equipment in DFW (AT&T is big here + military related companies like L3 and Raytheon), Austin ("New Silicon Valley"), or Houston (NASA and oil) in person. Someone warned the HP/Agilent group about this during the holidays.
https://groups.io/g/HP-Agilent-Keysight-equipment/message/130855?p=%2C%2C%2C20%2C0%2C0%2C0%3A%3Acreated%2C0%2Ctis+the+season%2C20%2C2%2C0%2C95354866The other problem is what Dave showed.....
Regular buyers adding items to the watch list.
I'm 100% sure there is data collection and an algorithm of sorts somewhere that statistically determines not only that you will buy an item but for how much so that the prices can be driven up with the hope of buying low. If all social media websites and ad companies get constantly criticized for data collection of their user's data for monetary gain (rightly so), you can bet your entire life savings eBay is the same way. YouTube as everyone knows (thanks to Dustin from SmarterEveryDay) takes this further by employing an algorithm to "watch every single pixel and listen to every word" against a databank containing genuine copyrighted content (i.e. major movie titles like The Avengers) and a black list of words/phrases to ensure copyright enforcement and bans. Possibly even shadow banning controversial content as well (i.e. firearm+3d print content).
Citation here:
As the icing on the cake to all this data collection, no one from the company themselves to the users or sellers (all possibly employing 100s to 1000s of people) is safe from cyber threats like outright brute force hacks to phishing emails. To put it this way, that data has traded so many hands it only takes one person making a single unintended mistake (i.e. socially engineered phishing email asking to click a pdf or check tracking for shipping) to break it's security.
TL;DR: A massive protip is to just search manually on something like Google (even this is sketchy for the future if not already, maybe more like an "archive.org" for listings like
https://picclick.com/ but how I use it is searching google with [insert item here] picclick.com click cached page) "religiously" for a true low priced buy of an item you desire that isn't pushed to unobtanium thanks to said data collection and lucrative algorithms. I only have watch later for items that I plan to sell so I can gauge the market for a FMV asking price. As always, stay safe and vigilant. Direct money transfers without knowing the seller's permanent residence is 100% a scam.