Since I've recently been investigating book sites, booksprice.com has been brought to my attention. Not being a bargain hunter, I put it on the back burner.
But recently, my need for books brought me back to the site. Sure, it's clean, efficient, and displays prices and vendor ratings. That's the basic promise. But for my high-price technical books and coffee table books, it's got RSS-feeds! (Here's one for Sculpting a Galaxy.) That, I can use. My computer can do my bargain watching for me. Excellent!