One problem with eBay is still hacked/sold/stolen accounts.

One time I "purchased" 100 nintendo DS consoles from a seller with 15,000+ 100% feedback .. was THIS CLOSE to sending them their payments... when I got an email from paypal/ebay security saying STOP, NO, DON'T!!! That account has been hacked!!!

So... you can never really trust anybody, when it comes to buying more than a chocolate bar that is.

If I want to sell you a house and royally fuck you in the process, I only need to "borrow" somebody's good name.