Why is this copy of Super Mario Bros. worth $100,000? We asked a buyer

Enlarge / Of the millions of copies of Super Mario Bros. ever sold, this is the rarest and most valuable known to exist. (credit: Wata Games)
A sealed copy of Super Mario Bros. for the NES has sold for $100,150, setting a new record for the video game-collecting market and perhaps ushering in a new era for the valuation of gaming rarities.
Before you go searching to see if that old cartridge in your attic might be your gateway to riches, note that this copy of the game is so valuable primarily because it’s one of the earliest known copies of the game, and in near-perfect condition. The box in question comes from Nintendo's extremely limited 'test market launch' for the NES in New York City and Los Angeles starting in late 1985 (no one actually knows the exact date). These copies didn't come in the usual shrink wrap but were instead sealed with a small matte or glossy sticker (this handy guide outlines the many different Super Mario Bros. box variants released between 1985 and 1994).
Deniz Kahn—CEO and cofounder of game-grading service Wata Games, which evaluated this specimen—estimates that only 2,000 to 10,000 copies of each of the 27 test market games were ever made in this sticker-sealed style. That makes finding even an opened box decades later rare enough. Finding one with the sticker seal intact is even rarer; Kahn estimates only a few dozen exist across the whole test-market line.
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