Hello, You all aware of Google Base & Froogle -both are service provided by Google. If you have E-commerce site, then it is good to submit your products in Froogle & Google base. By this you will get more selling of your product. Price depends upon whether you provide Product Feed or i have to made it. It is sure reasonable. This services are totally free by Google. But it requires certain skills in making Product feed files. Also if you are from US, then submit your business in Google Local & Yahoo Local. I have good experience of doing SEO For Ecommerce Sites & Yahoo Stores.