Another site I have been using quite a lot lately, and quite successfully, is www.SwapTree.com.
On this site, one can trade their old books, dvds, cds, and video games. It is extremely easy to use and set up an account, which is free as well. Also, the site is run in the most professional manner and I have had nothing but positive experiences. I am enjoying trading some of my stuff I have laying around, and even more I’m enjoying not having to buy the new stuff.
The only thing you have to pay for is shipping, however, you can set up a credit card on your account and print shipping labels straight from your computer and not have to deal with the post office hassle, or you can just pay yourself at the post office. I have found that when you print shipping labels from the site, whatever your shipping reaches its recipient much faster than shipping the regular way.
I am a strong supporter or recycling your used goods and it is really fun to do so on this site and find movies or games that you’ve been wanting to experience without having to pay anything for them. So, let me know what you think about the site (feel free to ask questions) and hopefully you can find some cool stuff too!