Convert sophisticated eBay screen scraper program to instead use eBay API

I have a sophisticated program which was written in Java and works as a screen scraper, drawing information from item pages on eBay, carrying out various complex functions and calculations, then producing an output text file in MS Windows. The problem is, it is a screen scraper and so is subject to every site change made by eBay. Instead of screen scraping I need the program to instead use the readily available eBay "API". This will make it more secure, immune from eBay site changes and much quicker. ## Deliverables 1) All deliverables will be considered "work made for hire" under U.S. Copyright law. Employer will receive exclusive and complete copyrights to all work purchased. (No 3rd party components unless all copyright ramifications are explained AND AGREED TO by the employer on the site per the worker's Worker Legal Agreement). ## Platform MS Windows