Appreciating Consoles?

[Nz17]

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? :pimp:

[vintagegamecrazy]

I noticed that the Atari 5200 and the nes have gained some value, as well as the Channel F to a lesser extent.

[Azazel]

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? :pimp:

Actually the Turbografx and Duo have gone done in prices compared to a few years ago. The Neo Geo also has mostly kept it's value.