Ebay Scanner Software

Hello We need a simple software that must scan all "buy it now" listings on [login to view URL] and identify the top selling products. The user must have search options, for example must appear all listings with more than 30 units sold for a specific category. -on the results 30 products sold must be the minimum and no limit for the max. -The software should also have a filter for results to appear by category, or ranking the products include all categories. - on the results must appear the product title, the price sold and link for the listing. - the scan must be fast speed and error free. - must also have keyword search option. The software interface must be attractive and simple to use. When you bid please show me some similar software you have created to help us decide.