In a letter to the US Department of Commerce, the RIAA is calling for stronger measures to curb piracy and counterfeiting that takes place through online marketplaces. The music group points out that copyright infringement is widespread on many services, including Amazon and eBay, where a significant percentage of the CDs and box-sets are sold without permission.
Source: RIAA: Ebay and Amazon Sell a Lot of Copyright Infringing Music – TorrentFreak