Although you can often find products directly from the main Google search engine, you can't easily sort those products by price or separate the stores from Web sites that just talk about an item.
Google Product Search is Google's shopping search engine. The information in the search comes from items that are submitted by vendors to Google Base. Items can be submitted individually or in bulk feeds. Individuals can even have Google Base host their item descriptions. Read more of the review at:
For a link to Google Product search directly, click below.