we know keyword tools like https://adwords.google.com/select/KeywordToolExternal shows digital camera 24,900,000 searches But i am sure most are not buyers.. may be they will buy offline but searching and researching online for reviews previews etc but is it possible to see which product sells how much in web and if possible from which sites(ebay or buy.com or a drop ship store).. quancast.com shows which website gets how much traffic etc. But which website shows. which product sold how much online? Not offline i know about pulse.ebay.com (but its not showing how much sold only interest of buyers) Can anybody help it out here.. Even 1 year old data is good how much online sales. And which product what..