In 1996, the Nintendo 64, a cartridge-based gaming console, brought video game graphics fully into 3D and became known for such legendary games as “Super Mario 64.” At the same time, Nintendo also produced a little-known peripheral: the Nintendo 64DD, which not only increased data storage for the N64, but also allowed the console to access the internet.

The N64DD connected to the bottom of the console, included a disk drive for data storage, and was provided to subscribers of Randnet, an internet service that allowed consumers to surf the web and use email. During the N64DD’s short run, it was never released outside of Japan; in 2001, Randnet was officially shut down and production for the N64 disc drive ended.

Today, the accessory can go for around $1,500 dollars due to its rarity, and one still in its original box is likely to garner about $2,900. For a unit in new condition, collectors can expect to pay a much higher price of $7,830 or more. Despite the failure of the device, it has gained the status of a novelty in the retro gaming world, raising its price well beyond what it was worth years ago.