My first Ebay experience was horrible. I bought a FW, and it came well packed, but had a terrible smell. She had said the machine had "no odor". I tried airing it out, etc. and finally sent it back. She had heavily sprayed the case with Febreze. (I can't handle smells very well)
She also tried to get me to go out of Paypal to handle this situation. I said no, then she threatened me. I called a Paypal rep and told her what they said. She didn't give up. But I did get my $ back, minus shipping. I did not leave feedback, as didn't want her to return the favor.
My second purchase of a FW I bought from Ebay: DeskDave's FW Factory, and love the machine! Excellent folks to deal with!
Do ask lots of questions, insist that no packing peanuts be used, and pay with Paypal.
:)