We are a online retailer selling on ebay. We would like someone to list amazon's listings on ebay for a higher price. We need APIs or crawlers to be able to change when the price on amazon changes . Also when the listing goers out of stock on amazon it should automatically go out of stock on ebay. The purpose is that when the customer buys from us , we buy from amazon and then get the seller to send the goods to our ebay customer.