Amazon MWS API Price Application - Developer MUST own or sign up for MWS access keys

This project requires that the developer have his or her own Amazon MWS API access keys. This is for the **new** MWS API, **not** the old PA API (which has been deprecated). **I cannot provide you my keys to use, you must have your own. ** This is due to security issues with this new API. During development and testing, you will use your own access key and secret access key. Once finished, I will use the application by entering my own access key and secret access keys using either a text file or GUI input box. If you do not have MWS access keys, but would like to obtain them, Amazon requires that you have 1 of the 4 following Amazon accounts: 1. Amazon Pro Merchant 2. Amazon WebStore 3. Checkout by Amazon 4. Amazon Product Ads I am not sure what these accounts require, but if there are any additional costs for obtaining keys, I will re-imburse you for the cost as a bonus at the end of the project. However, I think you can enroll in some of these as free one month trials. Regarding the application itself: I need a desktop application that will accept a text file of about 2500 ASINs or UPCs and retrieve the following: 1) Name of the item 2) Sales rank 3) New prices 4) Used prices 5) An indicator of whether the price of an item is a "Fulfillment by Amazon" listing, I believe there is a flag or something that indicates this. I believe you have to specify the ASIN and the condition of the item to get the prices. The old API only required the ASIN and it would provide **all** the prices. So each ASIN will probably require multiple calls to get all the prices. I don't need refurbished or collectible prices, only new and used (like new, very good, good, and acceptable conditions). I need to be able to view the data as it is being returned (streaming) and not have to wait for all the calls to finished. Output will be a grid style layout and I need the column headers to be sortable. I will provide a screenshot of my former application to give you an idea of what I would like.