I loved this tip from Krista:
I saw the Cash4books site on your extra earning page and decided to check them out. I didn’t have much luck, so I decided to see if there were other places out there.
I found MyBookBuyer.com and started checking books with them. I am getting ready to send in 17 books which, if all are accepted, will net me $68. On the other site, I was only going to make $21. So, if you’re considering selling books, it pays to check multiple sites! -Krista