Justin over at Gadling has been trying out a new online swap market called Swaptree. Users can trade books, music, movies, or video games with other users. No money changes hands, and Swaptree doesn’t take any money off the top (we imagine they have plans to make money eventually, perhaps through advertising).
All you have to do is type in an ISBN number for the books you want to trade, or UPC code for your other media. Then list the items you want in a “want” list, similar to an Amazon wishlist.
Swaptree will automatically search for users who have what you want, and want what you have. When it finds a potential trading partner, the service will send you each an email. If you both accept, Swaptree will provide each user with the others’ mailing address.
You can even print shipping labels directly from Swaptree. And with media mail rates, most items should cost $2.50 or less to ship.
The service is in private beta at the moment, but Justin’s got a few invites to give out.