I have some special editions, like the nintendo ds 25th anniversary, and the game boy micro 20th anniversary. I also try to collect as much special editions of the game boy advance sp, and there are alot around
. For the sega game gear there are a few versions around, but i dont have those...yet.
I dont have a Neo Geo yet, but im looking for it. As im looking for several other handhelds wich can be hard to find.
This is a nice site for all the different versions.
http://www.consolecolors.com/index.html
Software wise there arent as many collecters editions, but there are a few hard to find games especially the boxed versions.