I had an ebay business for about a year. It's my opinion, that like any other business, it takes money to make money. You need to have a large inventory. You need to have a product you can buy at a good price (probably in bulk) and sell for a profit. Enough profit to cover your expenses (foam peanuts, tape, boxes, etc.) and of course ebay's cut. I was selling books. It seemed like a good idea at first, as I could buy large lots of books at garage sales, normally for pennies per book. If I could make 2-4 dollars on each one, my profit margin would be huge. Now don't get me wrong, I made some spending cash, but nothing substantial. And after I started adding up all the time I was spending (Going to garage sales, listing each book, boxing it up, shipping it off) just to make that few dollars, it wasn't worth it for me. My advice would be to find alot of the same item so you can type it up once and sell multiple times, or go for the big ticket items. So to answer your questions, for me it turned out just ok, definately some potential there, And No, not even close to being my primary source of income.