I want to add information to the eBay listing. You would design an interface that would update listings by bulk. Data would be scraped from another source and I will also provide xml files that will contain information for certain listings. I have access to eBays API so you would need to be proficient with the way eBay works and how they arrange their data. PHP and MYSQL would be needed also, as I would like to have a "catalog" of information for future editing of the same products.