You are either lucky (no reserve auctions sometime don't go anywhere).... or everyone else on e-bay knows it's a scam.
I sold a working movie camera for .50 CENTS a while back on e-bay... took my lumps.
Also listed a working but well used/damaged Hasselblad 503cx, I didn't think it was worth more than $450 and it went for $800... and the winner complained it was damaged (first thing I said in the description). I held him to my no return policy... like I said the camera worked just fine.