I decided to sell my first gamecube because I bought the wii and convinced myself I could afford it as I could play all my lovely gamecube games on it as well
However.. haven't really played on any gamecube game for a couple of years now; but I still have a brand new mint Pearl White limited edition (with Smash football) sitting in the corner. Only paid £50 for it with an additional controller.
Some place was selling it for £35 though recently.