I just joined and am really having fun with this! It's an online book swap where you clear your shelves of things choking them and request books you want for FREE! (you pay for shipping to help another soul enjoy the book you're ditching).
I listed 13 books and had 2 immediate requests and 3 other books are waiting for people to confirm that they want the books I listed. Each book I've sent has cost me less than $2.50. I can't even buy used from Amazon for that price!
When you list your first 10 books, you get 2 FREE books (without sending any of your out!). One credit = one book.
I really like books! Paperbackswap