I noticed Mario & Luigi is retailing for 39.99 used at GameStop, which is insane. I'm guessing it's oop?
Yeah man, as others have stated, I wouldn't get into DS games unless you have an interest in playing them and value is just an secondary factor. If you are looking to profit off DS games, the amount of time it would take them to appreciate will offset their gains in value.
I.e. if the game takes 10 years to go up $10, you probably didn't even beat inflation and that $10 gain you made was probably close to $0.
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