First on ebay make sure of their ratings, check their feedback for people that have gotten burned by him, and check their feed back top to make sure they are not just whiners. Also be afraid of people wanting all the money within 10 days on something that needs to be picked up, Most will only want 10% down or something like that and the rest when you pick it up, look for one of those sellers, they are the best to deal with.

Hope these few tips help you out. Good luck