As a buyer, it can be useful and I do occasionally buy things on there, but I try to avoid it and use Amazon. As a seller, I absolutely hate eBay (and that's why I normally try to avoid buying things there, too). Their fees are exorbitant, around 10% these days. If a buyer files a dispute, he/she essentially always wins. Great for buyers, but that means you can send an item to a buyer, the buyer say "You said in your ad it was purple, but I wanted a red one. It's not as described," win the dispute, and then you have to pay for their return shipping. Had more or less that exact scenario happen to me a few times. The thing is depending on what you're selling (such as used airplane parts with a very small market), it's the only game in town.