Music industry
2003–2007

Approximately 21% of the gross CD revenue numbers in 2003 can be attributed to used CD sales. This number grew to approximately 27% in 2007. The growth is attributed to increasing on-line sales of used product by outlets such as Amazon.com, the growth of used music media is expected to continue to grow as the cost of digital downloads continues to rise. The sale of used goods financially benefits the vendors and online marketplaces, but in the United States, the first-sale doctrine prevents copyright owners (record labels and publishers, generally) from "double dipping" through a levy on the sale of used music.
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