I've sold some books on ebay but find it easier and more simple to use Amazon. There is no bidding just the price you put on the book. You might want to do that after checking to see what the prices are for the used books. They have many used books on there that are sold, and prices vary widely. I know myself I usually buy the used books because their cheaper. Oh the shipping fee is set and already figured for you.
Now if you want to sell say a group of simular books on ebay you can do that. You'll need a digital camera and put them on there and let people bid on them. Still in the long run if you put them individually on Amazon I think you will come out ahead. Good Luck