I'm surprised it's not more given how terrible ebay has become.
The Buy It Now products I find better than Amazon a lot of the time. If there's a random PC part I need or something for vintage computing I will always go to eBay first.
Any of the bidding or used hw sales I just stick with Reddit r/*swap subreddits.
I can't figure out what benefit Amazon brings these days... They seem like the most expensive option for anything not mainstream.