EBay just banned my account last week for listing a Macbook Pro with stock image, removing it to adjust the title, relisting it with a photo of the "About this Mac" to show that the specs were correct. (Can't think of anything else that would even be remotely related).
Also, the messages component of the Ebay web app was completely down the whole time so it made it impossible to respond to any users that were asking questions about the MacBook Pro. Completely insane. Apparently making listings is "harmful to the [Ebay] community"