Book trading site

Thought I had a great idea for a new web site for a minute; a book-trading site, where you would agree to send used books to other members if they would send books to you.  I know, I know, trading sites don't make profits and went out in the 90's, but I don't think that's the goal; any more than the little old men in carpet slippers who run used brick-and-mortar bookstores are really in it to make a profit.   The goal is to get around the godawful prices of books these days, and to find them nice homes when you're done with them.
 
But I did a quick search before I really started to look into it, and I found this one.  I skimmed for reviews and users, and found...nothing.  I don't think they've been open for more than three months, so I'm thinking I just missed the boat here.  Well, book trading is my goal, so I'll give them a try.  Hope they don't do anything evil with my credit card number.