When it comes to retro toys, one of the biggest anomalies from an investment standpoint has to be Nintendo Entertainment System games. These early Nintendo games were expected to rise astronomically in value, but instead the unthinkable happened – they went down in value. And not just by a few dollars, either. Life Storage reports that on average, NES games have plummeted in value from a $50 initial retail price down to a measly $19 dollars in today’s money. It’s important to note that there are still valuable NES games out there, such as Stadium Events, which is worth thousands. We’re going to go out on a limb and say that as time goes on, NES games will become rarer, and this generally negative trend will start to reverse.