I've been lucky, only scammed once. I had several things listed on e-Bay back in 2005 and some jerk in Texas set up 2 phony accounts and bid many times. When the
auction was over he ghosted me. I reported him to e-Bay and they investigated and told me they had no way to actually track him. There were three other bidders that quit budding because of the high bids. Now if a bidder has low or no feedback they have to call me before they can bid, it doesn't take long to know if they are a jerk or not.