Amazon Product API - extracting data for buyback service

We are looking for someone to create an initial project with further work to be won thereafter to allow us to do the following using the amazon api - For identified UPC/EAN barcodes, bring back data using amazon API in realtime and applying some simple PHP logic to the prices to create a buyback price, based on the sales rank and lowest price.: These also need to be cached in a database (Mysql?) table We need this to be present in a database which we can extract data from and manipulate (mysql to csv/excel maybe) Need this work to be done urgently so require someone who has done this before extracting simple info from the amazon api.. Any questions, please shout and provide evidence of work you have done with amazon api.