I bought this supergrafx in the '90. It is an upgraded version of the
PC Engine, released exclusively in Japan, primarily in response to the
Super Famicom by
Nintendo. My SuperGrafx is of course in like new conditions.
It has originally announced as the PC Engine 2, the machine was purported
to be a true 16-bit system with improved graphics and audio
capabilities over the original PC Engine. Expected to be released in
1990, the SuperGrafx was rushed to market, debuting several months
earlier in late 1989 with only modest improvements over the original PC
Engine.
This version comes already with rgb video conversion so i can connect the console to a TV with a normal scart plug.
I own two dedicate games for Super Grafx; Daikamura it's a action platform by Capcom where you have to defect lots of demoniac creatures and save your princess. The game is well programmed, hard to play with awesome graphic.
The other one is Battle-Ace, is a shooter in after-burner style.