1. Combat Wings: The Great Battles Of World War II
Unopened: ?? Used: $10,000 Do yourself a favour and pick up a game from a no-name studio every now and then. You never know what's going to develop a devoted following comprised of people who'll do anything to get their hands on it at some point in the future. Combat Wings is such a game. Developed by City Interactive, the title received fairly mixed to negative reviews, but as flight sim-lovers are a dedicated bunch, CW's inherent rarity through a very limited production has made it one of the rarest and valuable games on the system. Forget figurines or exclusive DLC codes, you'll barely be able to find a word said about this on Metacritic, setting up insane prices to own a copy like the above $10,000. Perhaps now's the time to have a rummage through your old collection - the old "One man's trash is another man's treasure" saying is truer than ever in the world of gaming. What's your rarest video game purchase? Let us know in the comments!