I am using Amazon MWS and i get all my product sales report. but I want to know if there is any way i can get sales report for any product ASIN which i am not selling. So That i can find prospective product to sell. --Thank you for your time.
As far as i know, there is no way to view the performance of any products that you are not selling.
The only indicator is the Amazon SalesRank, which you can get over the Product API (ItemLookup) or by Scraping the product page.
However, if you find a way, it would be neat if you post it here.
UPDATE: Thanks Jonathan, i updated the link. Jonathan pointed out that there's a new Product API in MWS. Use that, folks ;)