ShopExt: Organized multi-store shopping. Everyting in one page. About Have you gotten tired of looking for all the prices and information available for a particular item? Well, I did. Enter ShopExt. Here, I've gathered multiple stores together and all their information available for a particular product so now it's convenient. 1 page with all the prices and information for 1 product. Take a look see. For example, the Pentax *ist