Back in the early 90s, Nintendo and Sony got together to create a next-gen system. The project never got legs and supposedly only 200 prototypes were ever produced.
Well apparently a reddit user known as Dndbld claims his father had Sony connections and has a prototype system in pretty good condition. If this system is legit this person could sitting on a small fortune.
I myself had no idea this was even a venture that took place. I looked into it and I think this is what the system was supposed to look like:
The marriage between Nintendo and Sony must have ended badly considering all the PlayStation commercials that took shots at Nintendo back in the day. Overall, pretty cool though!