Just had experience with a massive fraud on ebay. 100% positive feedback seller with <150 expensive transactions skipped out on around 100 auctions after people paid an average of $300 each. (it wasn't clothing BTW, it was books) The Neg FB and the "no longer a registered user" came 3 days after I paid.
I can only guess it was a hijacked account, because the owner of the account isn't exactly underground. Based in what I'm reading and what the other defrauded bidders are learning, I have a few tips, which may be known to many already:
As a buyer, if you don't pay for your item with Visa or Mastercard, you very well may be out of luck. I paid with Discover, so I most likely will be OK when I ask for a chargeback, but Amex and Discover have been given people problems in the past when they chargeback to paypal.
The paypal claims process is ponderously slow. Often if you wait for resolution through Paypal you will run beyond your credit card chargeback time limit. I can't imagine having to fall back on this process had I paid with an electronic funds transfer. The totally unhelpful e-mails from paypal ignoring my questions are just unbelievable.
Paypal "buyer protection" is available up to $2000 per item only if the buyer meets certain criteria, as this fraudster did. In other cases, the item is protected to $200 ONLY IF THERE ARE FUNDS LEFT in the fraudsters account.
This was my first bad transaction on ebay as a buyer, but it was a biggie for me.