Recently, my interest about the TurboGrafx system got stirred up, so I decided to look at prices on eBay. Yowza! Talk about sticker-shock!

However, this got me thinking -- which systems are appreciating in value? I know most of the mainstream systems just fall in value until they hit a plateu, and many smaller systems become practically worthless. There are exceptions to the rule, however, and the TurboGrafx/PC Engine seems to be such a case. Which other systems are gaining in value?