Gaming has erupted and evolved since the 80s. Nintendo, Sony, and Microsoft have released several amazing generations of consoles that perhaps, a millennial or Gen-X person has lived to see and experience most of them.

The NES is almost forty years old. Gamecube just celebrated twenty years, and the first Xbox will hit that same benchmark this November. Games from previous generations are selling at a profit because it’s “vintage” now–such as the original Super Mario Bros. that went for two million dollars. A copy of Super Mario 64 sold for 1.6 million, and someone actually paid $870,000 for an original Legend of Zelda.

While many of us may not have the rare editions sitting pristinely in its original packaging, many gamers are growing older with several classic games in their collection. Some simply keep them to revisit when they are feeling nostalgic, while others are avid collectors.