I just had an auction sale on eBay. Winning bidder ghosted me on payment. So it was relisted as a "But it Now". Looks like it might have been a bot (2 purchases in their history, fairly recent account creation). I usually try to stay on top of my auction sales, since bots proliferate, especially in the used camera market, which is my jam... I watch near the end and will cancel and block suspected flakey/fake bidders asap...again, criteria for that is no history in eBay, brand new accounts, based overseas, etc. I'm still not sure how the overseas bidders leak through, since my default is sales to mainland U.S. only. This is why "Buy It Now" with immediate payment is so common and desirable these days; but often setting the price that will sell gets a little muddy (Yes, I use "Make an Offer"). Fun, no?!