Crazy Retro Game Prices

The retro gaming scene goes through swings and roundabouts. Often, when a new generation of gaming arrives it spells the end of the previous generation and frequently, this is the best time to pick up some future classics and rare collectables. However, some games go under the radar, are much coveted, have limited editions or have a small print run and fetch a high price for those reasons. But occasionally the retro game prices can make your eyes water and that is what this post is about. I'll start off with these two but will add more as I find them.

Have you ever come across crazy prices in shops for rare games? I know in gaming expos and conventions crazy prices for retro games is the norm but how about in the wild?