The "Recommended Reading" section of the Wiki now includes a price-search feature for most of the books on the list! Just click the ISBN number, and you'll be taken to a Wiki page with links to the Amazon.com and BarnesAndNoble.com listings for that book, as well as links to the AddAll and PriceSCAN price searches (for both used and new books).
http://www.expressobeans.com/wiki/index.php/Recommended_Reading
Please feel free to add other books - it is a Wiki, editing by everyone is encouraged! If you just want to enter a title and author, a volunteer will follow with formatting and adding other information...you can't screw it up, don't worry!