Got a spare million Euros? You could purchase this guy’s collection which is up for sale on eBay.
The collection contains full software sets for 22 systems (all Japanese except where noted) – Famicom, Famicom Disk System, Virtual Boy, Super Famicom, Nintendo 64, Nintendo 64DD, GameCube, Master System (EU), Mark III, Game Gear, Mega Drive, 32X, Mega CD, Saturn, PC Engine, PC Engine CD, Supergrafx, PC Engine Super CD, PC-FX and Pioneer LaserActive – many of which are still sealed. He’s willing to sell systems separately, but not titles separately.
Frankly, you’d be taking all of the fun out of collecting, but it’d make a nice conversation piece.
Edit: And it sold. Let’s wait and see if it was a legitimate sale, or if someone was pissfarting around.