This website specializes in price comparisons for books. 

Comparison Shopping Beyond Compare.  The Smart Place to Start Your Shopping.

Don't buy it before you PriceSCAN it!

I used to use DealTime to compare prices, until one day I went to the site and noticed that the whole website was change.  Apparently, the new site, Shopping.com, is a derivative from the best of DealTime and Epinions, and provides the "ultimate shopping experience,"

Shopping.com provides all the information you need to find, compare, or buy anything in just a few clicks.