i probably wouldn't be surprised if there is a large racketeering ring that operates a network with different ebay accounts and ip addresses, bids on high value items and then just files a dispute and sends back a box of rocks, and just keeps the cash and the items. The easiest place to steal these days is ebay, i'm surprised ppl haven't filed a class action suit on ebay for aiding and abetting scammers. technically they are a willing accomplice with their "buyer protection" that doesnt need actual proof.