I haven't used Ebay to buy sell or anything else in a while. I now use sites like FBBO for those things now. I remember a few years ago when Ebay was the way to go for this hobby. I know Ebay has a lot of aftermarket stuff but except for that does any hobbyist do a lot of buying or selling there? One thing I've found if I Google a part name and number it sometimes sends me to Ebay. So for IDing parts it helps.