Lucy Orbach from LISNews.com discovered a cool free online service:
BooksPrice is a free innovative service of finding the best price on a purchase of several books together. This service is more useful than the standard services which perform one book comparison at a time, and can save more money when buying several books together. Another unique thing in BooksPrice is the comparison of the prices of books in Amazon Wish Lists. One can search for his (or his friends) wish list and compare the prices of the books in the list.
[via
LISNews.com]