Stadium Events is a fitness game made by Japanese firm Bandai in 1987 for the original Nintendo Entertainment System (NES). It is known among industry experts as being one of the the rarest-ever NES games due to a recall by Nintendo, which planned to release it under its own name.
On auction website eBay, the game is described as "complete" and "factory sealed". By midday GMT it had received 81 bids and the current bid was $99,850. The listing is set to end at 3.00 a.m. GMT on Friday morning.