I've been a buyer on eBay for a couple of years and just started selling last month. Personally, I think that eBay has a lot more advantages to the buyer than to the seller ~ unless the seller is a store and has high turnover rate.
I'd advise you to read the description of items very closely, and look at all pictures that the seller provides. Ask Q's if the seller seems vague in their description. Another tip: stick with sellers that have a very high rate of customer satisfaction! I won't buy from a seller under 98%, and strongly prefer those around 100%. For me, that makes the experience worth every penny.
I have bought a couple of items from China before, mostly because the objects weren't available from sellers in other countries. Not that I dislike China ~ just trying to support U.S. economy (or whatever country you're in). That's important to me. Hope that helps you lynn P.!