Have a Snickers bar, Bro.
I won a set of Avengers Annuals for a song. A week goes by and I get a refund along with a note telling me the books were her boy friends and he decided not to sell them. When I replied that we had a contract she should honor, I was told that her boyfriend was on the Miami Heat and had jew lawyers on speed dial. Just for fun, I wrote back saying I was going to forward her emails to someone I knew from NY who was then doing talk radio in Miami. Next email informed me that both of them had lots of Jewish friends and one of her boyfriends college teammates was then playing in Israel. It got too weird for me so I let it go.
A friend won an Omac 1 as the only bidder and was told that the FBI had contacted the seller and said the book was stolen and ordered her to return it to the original owner.