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Antonio Romero Monteiro has almost every video game you’ve ever heard of – from Nintendo to Poop Slinger. He started collecting as a kid, enjoying the gameplay and fantasy stories. Part of collecting means being aware of the slight differences that increase the cost of an item. Monteiro shares why the same video game can be 25 times more valuable than its counterpart. At 23,063 games, Monteiro estimates his collection to be worth around $1.6 million.

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