I just won a ebay auction for a 4GB memory stick. Well, I told one of my friends about it, and he said there are a lot of fakes out there. I'm worried, is it possible that the one he's sending me is a fake? If it is, I hope this guy dies a slow painful death

Anyway, what are the odds that this is fake? Are there a lot of fake ones for sell on ebay? If it IS fake, is there a way to get my money back?