For those that have not heard about it, you should really check out Swaptree. It's pretty simple, just log on, list the books you have you are willing to trade and then enter your wish list. Swaptree will hook you up with others wanting a book you have in return for a book you want, even performing 3 way trades. You can print shipping label or even pay for shipping thru their site.
Easy Peasy...find me on there if you sign up, raycee3.