Sleep with an Airman

Game System Question..

I'm thinking about getting either a Gamecube or a PS2.. I already looked on GameStop's website.. and the GameCube seems to be the best priced one on there right now... then I looked for DDR games for it.. and didn't find any for it.. so what are the best reasonably priced GameCube game sites out there? Thank you in advance and Happy New Year!