We're all aware of the rare video games to watch out for as we hit garage sales and thrift shops. Such things are obvious. But did you also know there are actually rare systems of which you should also be aware? There are many classic, rare, and unorthodox consoles in the wild, sometimes even prototypes, and you should always keep your eyes open for one of these guys. You never know when you could stumble across an invaluable piece of gaming history.

Image Credit: Dave Ward