I just read about Sande's experience "buying" a CDTV keyboard on Amibay and was wondering if it might be a good idea to have a pinned thread with info on users/user-accounts that have stolen from people? It might be in poor taste, I'm not sure. But if there is no doubt that someone took money, in bad faith, then their handles and info should be available, and easily accessible somewhere.
I bought a Blizzard PPC years ago, from Portugal, and that was a pure scam. The seller kept sending me e-mails after recieving the money with excuses as to why he hadn't posted the item, until a couple of months later telling me that he had unfortunately sold it to someone else. He said he would refund, but had to do it in several smaller amounts. However, he never did, and when I began asking when he was going to he got increasingly hostile until finally telling me to "f*** myself". Which I though was uncalled for, considering the circumstances.
It turned out the guy had scammed a bunch of other people as well, but we only found out there were more of us when I made a thread on the guy on amiga.org. The whole thing could probably have been avoided for many of us if there was a list of these bastards.