indy personal shopper

I wish to have website made (incl. both platforms&apps) that not only sources such as [login to view URL] (check coding) and [login to view URL] (com), and finds the item (say a record) and initiates a purchase for the indivial whom has purchased the app, this app (website) can also allow for not only searching out other sites but allows for a field for input of new names (like a search engine) So in other words complete fulfillment finding best price or product etc.