The world's largest video game collection is up for auction over on Game Gavel. There are over 11,000 games in the collection, and it has been recognized by The Guinness Book of World Records. Bidding for the collection is just over $100,000 at the moment.
You can see panoramic views of Michael Thomasson's collection here, here, here and here. They all look like they're in good condition, so I imagine that they all should work. I love playing retro video games, and there are a lot here that would be really fun to revisit. This is a breakdown of games that are included:
"The following categories are COMPLETE U.S. sets, and may also include import titles, as well: 3DO, Action Max, AGP X-System, Atari 5200, Atari 7800, Atari Jaguar, Atari Jaguar CD, Atari Lynx, Buzztime, Captain Power, Game Boy Advance e-Reader, Neo-Geo Pocket Color, Nintendo Virtual Boy, NUON, Sega CD, Sega Saturn, Sega Dreamcast, Tapwave Zodiac, Tiger Game.Com, Turbo-Grafx-16 CD and Turbo-Grafx-16 Super CD.
"The following categories are NEAR COMPLETE U.S. sets, and may also include import titles, as well: Bally Videocade, CougarBoy, Fairchild VES Channel F, Game Wave, Gizmondo, Halcyon Interactive, LaserActive, Magnavox Odyssey2, NEC PC-FX, N*Gage, Sega 32-X, SuperVision, Vectrex and XaviX.
"The remaining games are for the following platforms: Amiga CD-32, Amstrad CPC, APF MP1000, Arcadia 2001, Atari 2600, Atari XE/XL, Bandai / Apple Pippin, Bandai Playdia, BBC Micro, Casio Loopy, Colecovision, Commodore 64, Commodore 64/128, Commodore Vic-20, Dragon 32, DVD Interactive, Epoch Cassette Vision, Epoch Super Cassette Vision, FM Towns, FM Towns Marty, Hyperscan, LaserDisc Interactive, Leap Frog Leapster, Leap Frog Didj, Mattel Intellivision, Mattel Aquarius, Microsoft X-Box, Microsoft X-Box 360, Microvision, MSX, NEC TurboGrafx-16, Neo-Geo AES, Neo-Geo CD, Nintendo Entertainment System (NES), Nintendo Family Computer Disk System, Nintendo GameBoy, Nintendo GameBoy Color, Nintendo GameBoy Advance, Super Nintendo, Nintendo 64, Nintendo 64 DD, Nintendo GameCube, Nintendo DS, Nintendo 3DS, Nintendo Wii, Philips CD-I, Radio Shack TRS-80, RCA Studio II, Sega SG-1000, Sega Master System, Sega Game Gear, Sega Genesis, Sega 32x CD, Sega Pico, Sinclair ZX Spectrum, Sony Playstation, Sony Playstation 2, Sony Playstation 3, Sony PSP, Sony Vita, TI-99/4a, Tiger R-Zone, Timex Sinclair, Tomy Tutor ,V.Flash, V.Smile, Wonderswan and Wonderswan Color."