In 1990, Atari (the original Atari) were in bad shape. So they sold off their inventory of old cartridges. O’Shea Ltd bought them. All 3 million of them.
They bought them so they could sell them on to you, the public. And where do they keep these millions of Atari cartridges? Why, in a 20,000-square warehouse carved from a limestone cave, of course.
In the years since 1990, O’Shea have sold two million of the carts to customers around the world, leaving, yes, [[link]] around one million of them left. There are carts for the 2600, 7800 and even a few for the Jag.
Best part? These being “new” carts, and O’Shea being specialists in the closeout business (ie selling crap after a company goes bust), the games are [[link]] going for a flat rate of $5 each.
GameSetInterview: On Atari Cartridges In Deep Caves [GameSetWatch]