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In the days since Aaron Hernandez went from a Patriots tight end to a murder defendant, his jerseys have become hot sellers on eBay, as memorabilia collectors and Hernandez’s remaining fans have looked for opportunities to buy Hernandez jerseys used now that the NFL and the Patriots are no longer selling Hernandez jerseys new.

But there’s one big problem for those who would like to pick up some fast cash by selling their Hernandez jerseys: Some people who think such sales are in poor taste are going on eBay, placing the winning bids in the auctions, and then refusing to pay after the auctions are over.

One seller told Yahoo! Sports that the $305 winning bid he got for a Hernandez jersey and a signed mini-helmet was followed up not with payment, but with a hostile message from the supposed buyer.

“I don’t think that I will be getting paid,” the seller told Yahoo! Sports. “The person emailed me stating I should ‘burn the jersey and stop seeking money for that morons actions’. Looks like the person has some kind of social agenda.”

That same buyer has done the same thing in at least 15 other eBay auctions, which means that many of the people trying to sell Hernandez jerseys have simply wasted their time by “selling” to someone who is never actually going to pay.

Winning an auction and then refusing to pay is a violation of eBay’s rules and possibly a violation of the law, but it’s not clear whether anyone will be able to track down the bidders who have been doing it here. So if you’re trying to turn a profit on your Hernandez jersey, seller beware.