Nintendo Cartridge Discovery Could Be Worth Thousands

One of the PSA 10 cartridges in its grading envelope.
Image: psavideogames on InstagramKevin Braun, owner of the nostalgic store OneStopWonders in Wisconsin, was planning to sell a box of vintage video game cartridges that had been sitting in storage for years. When he invited Jason Ganos, owner of gaming news site Nintendo Wire, to help him, neither of them expected they would uncover a rare piece of Nintendo history—or the first game cartridges to achieve a PSA 10 grade.Ganos, who loves