From the website:

PriceGrabber.com is the industry innovator in online comparison shopping. Millions of consumers use PriceGrabber to quickly obtain free and unbiased information about products, services, merchants and sellers before making a purchase decision.

PriceGrabber’s innovative comparison shopping services make it a valuable ally for any shopper; they include: BottomLinePrice calculations (tax and shipping included in price), Storefronts marketplace (individuals without a website can sell their own products), merchant ratings and reviews, detailed product information and reviews, side-by-side product comparisons and email notification of the best prices and availability on the Internet.