Amazon EAN/barcode crawler

Hello, I need a software being written that will crawl [login to view URL] (German Amazon website) for a given set of EAN codes (German version of UPC codes, the barcode printed on a product), and return several values: item name number of offerings in new and used state lowest price for each state name of the lowest offering competitor for each state tbc The EAN codes should be imported from a plain .txt file. The program should be developed in VB.net or C#.net (Visual Studio 2010) and it is required that I´ll receive the source code including full rights. Thanks Alex