If you think you can save big money by buying books at Amazon.com or Barnes & Noble, think again. To save really big, you need to forget these retailers and go to eBay's half.com.

Yes, these are not always new books but in many cases they're in such good condition they might as well be new, and the prices are just terrific.

As of this writing, a new, hardcover version of Dan Brown's The DaVinci Code could be purchased for just $7.99. Brown's other big seller, Angels and Demons, was selling in brand new, gift quality for $3.63, and a copy of the book in