I hate this sort of thing and it appears to be happening far too often. For those who know a bit about eBay and phishing etc it is a bit easier - but I feel sorry for the people who may not know much about the Internet etc and can fall for these scams easy.
My girlfriend (now well educated on the subject by moi) was actually on her way to the post office ready to post a phone to Nigeria - without even knowing anything about the auction, I told her to stop and that it was a scam. Money had been promised but not actually sent. These

get away with it too easily and for that reason I think eBay is eventually gonna go down the swanny
Hope you manage to resolve your issue - it's probably some spotty half wit sat at his computer, if so then I think you scare tactics are probably gonna work!
Maz