U2 jump-started this whole custom-iPod trend back in 2004. Since then, Apple has released a few other customized versions of its nearly ubiquitous MP3 player. The limited-edition players generally carry a bit of a premium for their customized hardware and bundled software. Still, as far as extra cost goes, those players have nothing on the $2,100 Prince iPod.

The purple iPod Touch isn't available through Apple (not even it could get away with that sort of price hike). Customers have to buy it through Kraken Opus, a high-end (like $6,247 high-end) manufacturer of books. So, what does a little over $2,000 get you? A purple iPod, 15 songs, and 40 minutes of concert footage.

That, as Media Memo points out, comes out to around $150 a song.