A website that is clean and simplistic, but also hooks into other websites for increased functionality

An eCommerce website with a simplistic, easy to navigate design. The website would also need to require accounts to be made for each user. This website would need to hook into the sharing functions of all major social networks (Twitter, Facebook, Google+, Tumblr, etc.). In addition to this it would also need to hook into other websites such as [login to view URL], [login to view URL], [login to view URL], [login to view URL], etc. to find whatever it is that the user is looking for in each store by simultaneously looking for items in those respective stores, and then displaying a link to the website with the lowest price for said item, or related items if the specific item can't be found, and then a "Buy Now" button. There would also need to buttons to allowing sharing of that link (along with the price) to the social networks that are listed above, allowing the customer to share what they just bought or found online with their friends.