Nonetheless, Garriss said that PESA has been encouraged by eBay's willingness to listen to sellers' concerns, and by the company's pledge that the changes in feedback and other areas are open to revision.

Brian Burke, eBay's director of global feedback policy, said that there will always be sellers who are intensely opposed to the feedback changes and buyers who will try to abuse the system, but eBay is convinced that ultimately everyone will benefit.

"Most of the sellers understood why were doing what we were doing even back in January when we made the announcement," Burke said.

"There will still be sellers upset about the changes, and some buyers will try to abuse it. Hopefully, the reporting structures we've put in place and the policy changes will provide sellers with the protections they need, and we'll correct things as needed on that front," he said.

This is the global rollout schedule for the feedback changes: