Hoping that all of their sellers don't leave to start their own web stores, eBay launched a new service call ProStores. ProStores will let sellers set up their own e-commerce site (with their own domain name even) for $6.95 a month with a .5 - 1.5 percent transaction fee per...transaction. With revenue slowing down, they had to think of something.  ¶ 5:27 AM