Two-hundred and forty nine US dollars

Metroid Prime and Echos were only ported to the Wii in a trilogy package
Wind Waker - GCN only
Twilight Princess - Originally GCN Only -- ported to the Wii upon release.
Ookami - I KNOW there is a game for the Game Cube. I've borrowed it from a friend once.
Melee - Obviously GCN.

Metroid Primes are better with Wii controls.
Twilight Princess was released simultaeneously on both consoles in Japan and ALMOST A MONTH LATER on the GCN in the US. And it's better on the Wii.
Okami is a PS2 game.

Not really trying to argue that the GCN had some gems, but a lot of the Nintendo made ones were bested by Wii re-makes. Even some third party games, like RE4, had the same treatment.