Well GameCube is cheap as peas because of the Wii ability to play the games. WiiU games will not play physical in the switch... It was just confirmed in Japan.WiiU games are already expensive and I am not only talking about the usual suspects. Crappy games like funky barn or wtv are still around 6 pounds and higher and people are still buying them... I am guessing not to play them but already collecting the most they can before some games getting crazy prices.
I did not find the right solution from the internet.
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