A simplified valuation of commoditised art

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After paying to watch a film once, I can get the full amount of entertainment from it. An album, however, demands to be listened to many times. As both a film and an album in digital format have similar value (to my eyes and ears) and minimal physical costs, the price of buying an album of downloadable MP3s should be the same price as cinema admission or renting a DVD, ie around £3.