I have developed php web scripts to take raw data from a database or flat file and transform them into ebays File Exchange protocol, for insertion directly into ebay or into Ebays proprietary upload listing app "Turbo Lister".
With this web script you never have to type listings into ebay directly again, they get directly imported. Using "Turbo Lister" you can modify your listings to be auction or fixed price, set the time of the auction and or edit the listings for whatever reason you want.
I use this app usually weekly for our own production stores and your sales will increase on ebay 100-200%.
Call for details.