I wouldn't trust it. I lost a grand trying to buy a MacBook Pro over eBay, and I'll never see it again. After that, an online camera store tried to sell me a grey-market Nikon D80 and I had to cancel my credit card to keep them from charging me.
Don't go cheap on a large investment. Buy it at the proper price; anybody that sells it to you much lower is taking a shortcut, there's no way around that. I can't tell you how good I felt going down to a real camera shop, picking up, touching, feeling, smelling the thing I spent my hard-earned cash on. I didn't have to sit nervously in my art department for a week and a half wondering if I had gotten ripped off.