eBay has added automation features to its Selling Manager Pro listing tool. A new rules-based "auto list" feature allows sellers to automatically list items from inventory based on certain criteria, and costs 10 cents per listing. "Automated Positive Feedback" allows sellers to set preferences to automatically leave positive feedback after a certain event, such as after the buyer has paid. Other features include "Auto Relist" (10 cents per listing) and "Automated Emails."

http://pages.ebay.com/sell/automation.html