All my systems are boxed with instructions. I have most of the accessories for the systems like 3D glasses,light phaser, Tv turner etc all boxed.
Atari 2600.
Lynx.
Colecovision.
Sega:
Sega master System
Game Gear.
Saturn 1 & 2
Sega CD 1 & 2
Genesis 1 & 2
Dreamcast
Sega Pico
Turbo Grafx 16.
Nintendo:
NES
SNES
Game Cube
N64
Game Boy
Sony:
Playstation
Ps one
Ps2 1 & 2
Ps3 60 GB
Neo Geo AES
Most of the stuff I have, is from my childhood. I'm not really a collector in the sence I have to have every system.... I collect stuff that I find amazing to play with, same goes for games.