If you want to save money on books, CDs or DVDs, check out these sites to be able to swap with other members (for just the cost of postage). There is no cost to join any of these programs:
Swap Books and get new books at cheap prices at PaperBackSwap.com.
Swap your old CD’s for others at SwapaCD.com
Check out SwapaDVD.com and exchange your old movies with others