There might still be a reason you'd want a GameCube. The Game Boy Player, maybe? Quick access to Cubivore without the hassle of the Wii Menu? Holding down papers in a drafty room? If you find yourself in need of Nintendo's newest old system, Amazon is selling them today for $60. It's not the best deal ever, but $60 isn't terrible for something that will run Ikaruga.
You're more likely to be interested in Amazon's other Deal of the Day offering: a Platinum GameCube controller for $17. If you need more controllers for Super Smash Bros. Brawl, this is a good time to stock up. These will no doubt sell out soon to enthusiastic Brawlers!