Book Swap

The folks at Paperbackswap.com are going to be expanding their offerings to include DVDs, possibly by the end of the year. This is a wonderful site for readers who don't want to spend a fortune. Check it out.
How it works: Book swaps aren't limited to paperbacks. Members order books from each other--members ship at their expense but then get a credit, which can then be used to purchase books from another member.