I sold a laptop on eBay once long, long ago. Someone did the "Buy it now" option but never paid. I'm trying to remember the exact situation (probably more than 10 years ago), but I had exchanged messages with him several times and he always had an excuse to not pay. Then I noticed he was selling the exact same model of laptop so it was easy for me to realize that he had just "bought" my laptop to remove the listing s…
Just remember eBay has almost no way to report scam listings, hacked seller accounts, obviously fraudulent buyers, etc. They don’t want to clean up their act. Caveat emptor. Two executives were recently imprisoned over harassing a journalist, to give you an idea of the corporate culture. https://en.wikipedia.org/wiki/EBay_stalking_scandal
I do know for a fact that eBay can kick a seller off very quickly though. I bought a NES shaped raspberry pi a few years back as a gift. The day I got the item, I went to leave the seller glowing feedback, only to find his account was axed (he included NES roms on the SD card).