I have about 1000 books that I want to sell. Instead of listing all of them on just Amazon, I am wondering if there is a tool to list a book to multiple websites at the same time and manage them all easily. I found a website called Vendio, but I was looking for something that will allow me to sell across even more websites that specifically sell books. Has anyone had experience with this? Do you think I could make some decent money?

You can make some money by selling ebooks. Also try to sell books through forums like DP etc.

I don't want to sell ebooks I have tons of physical books I want to sell.

My suggestions is to use FBA program on Amazon. List and ship all the books to their warehouse and you don't have to worry about anything else.