Try to keep in mind that a lot of the people who sell on EBay do it for a living. Those are easy to spot with a ton of positive feedback. They are usually very customer service related and their business thrives on positives. There are some scammers out there, so you have to be careful. Just don't go for deals that are too good to be true.

I've bought a bunch of stuff from EBay and have never had a bad experience.