With the Storefront Profit Extractor you can download asins from a amazon sellers storefront to find all the profitable products that you may be able to source and sell. To analyze the data you will need Oaxray. Also this extension is great for researching ideas for t-shirts and coffee mugs. Simply do a search for your target niche and run storefront to find the best ranked shirts or coffee mugs. With that information you can tell what is selling the best and design your own top selling products.