Cus most of the fools I know don't just have that kicking around. Review from Joystiq:
Regardless of how Activision attempts to market DJ Hero, it's not for everyone, and it's certainly not a party starter. It's a single-player experience tailored to the crowd who grew up on Daft Punk, the people who experience potent fits of joy when Girl Talk appears on a shuffled iTunes playlist, and the people who idolized the guy who could show up at a local bar with a box of records and make everyone in the joint start tripping the light fantastic.
[Joystiq]