Sure, the 50,000 pirated tracks on your external drive are impressive, but they don't hold a candle to the 3 million records and 300,000 CDs up for grabs in The World's Greatest Music Collection (bidding currently at $3 million, with no reserve). Containing more than 6 million song titles, it's the undisputed largest collection of recorded music in the world. As such, about half of the recordings have never been played, and every genre of 20th century music is represented. Estimated to be worth more than $50 million, it's a steal at its current price — and if you're thinking that you could simply download it, keep in mind that at 30 seconds a song, it would take almost six years. In other words, don't bother.