In the world of collectible video games, some vintage copies have sold for very high prices at auctions.
This month, for example, an unopened copy of "Super Mario Bros," released in 1985, set a new world record.
A copy of "Super Mario 64" from 1996 and another of "The Legend of Zelda" from 1987 sold for $ 1.5 million and $ 870,000, respectively.