An unopened copy of Super Mario Bros. has actually cost $660,000, smashing the world record for a computer game sale. The previous record was $114,000 for another sealed copy of Super Mario Bros.

The copy of the NES traditional offered on Friday at Heritage Auctions in Dallas. It is the finest recognized copy of the earliest sealed hangtab Super Mario Bros.

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The video game was identified “Super Mario Bros. – Wata 9.6 A+ Sealed [Hangtab, 1 Code, Mid-Production], NES Nintendo 1985 U.S.A.”.

So why is this specific copy of Super Mario Bros. so important? It’s just the 4th variation of Super Mario Bros. ever produced, and its window of production was incredibly brief, Heritage Auctions stated. The across the country United States release for the NES can be found in mid-to-late 1986, and black box video games dispersed for that release did not have the “Game Pak NES-GP” code. Nintendo included the hallmark sign to the NES on its video game boxes by the start of 1987. That indicates this copy of the video game can be dated to some point in between late 1986 and the start of 1987 – a brief production run undoubtedly.

Image credit Heritage Auctions.

“This particular copy was produced in late 1986, and it was one of the earliest copies produced that had plastic shrink wrap, rather than sticker seal,” Heritage Auctions video games director Valarie McLeckie said.

“By early 1987, Nintendo was producing a version that had another new variation to their original packaging (an additional ‘code’). Since the production window for this copy and others like it was so short, finding another copy from this same production run in similar condition would be akin to looking for a single drop of water in an ocean. Never say never, but there’s a good chance it can’t be done.”

Heritage Auctions said the video game was bought in late 1986 as a Christmas gift but ended up inside a desk drawer, where it remained untouched for 35 years. It was then discovered earlier this year.

“It stayed in the bottom of my office desk this whole time since the day I bought it,” stated the seller, who asked not to be identified. “I never ever believed anything about it.”