Ebay has not changed there policy as far as I know. It seems like if you use the word receiver in a add, it sends up a red flag and the add gets pulled. Many creative sellers have learned this, and use words like trigger housing or parts in there adds. How Ebay enforces there rules seems to depend on the anti gun climate at the time. At one point if you were selling holsters, gun cases or tools for guns you could not have a photo of a real gun in the add or it would get pulled.