I see it from both sides, going through a situation now where seller (and i dont doubt it) has sent payment but i havent recived it. He probably thinks im a scammer but damn, im not. too honest for my own good.

Also have given neg feed back in comment but green light on transaction once only. Bought something and paid good $$$ for postage to have it dropped off on my old huse inext to the bin in a plastic bag (a ripped and old one at that). Not happy then the guy sends me messages that i cracked it over door to door service.

Ebays is ok, treat it with caution (buyer beware) same as every classifieds section of trading post.