Like everyone mentioned, eBay is the power house for you to get good-targeted customers to buy your items and also to find quality items to buy. If you're looking to sell, take a look at iOffer. I have used it for a couple of years to sell, obviously not even close to from what I earn from eBay. But give it a try! I wouldn't recommend anyone to buy from the site though, since most items are fake, replica's etc.