Amazon price update

I need a relatively simple tool that allows me to bulk update my products prices on Amazon using ASINs as unique identifiers. The product database is in Excel format. For each product ASIN from the table, the application must return selected values from Amazon: minimal price for each product condition (e.g. new, like new, good, acceptable etc), number of sellers selling the item for each product condition, and link to the product page. Then it must match the existing price for the product, and calculate the price difference in the separate cell. The table columns must be sortable. Then I can select all or some product rows to automatically update (raise or lower) product price to a returned minimal value. I would also like to be able to mark those products in the database that can never be updated. Thanks for bidding.