Let’s start with Sega.
A Katana with Ecco source code:
SEGA DREAMCAST KATANA Hardware development kit WITH ECCO II SOURCE CODE

Unreleased goodness! True Grail!
DC rarity:
Sega Dreamcast Dreampoint Controller Camouflage
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Now Nintendo.
Proto for your NES:
Darkman NES Proto

A good proto from a great collector!
2 GBA dev carts, ready to host some protos:
2 Nintendo Game Boy Advance empty dev carts

Same seller. Great items, but I hope that he never starts working as photographer!

boxing fever gameboy proto
SNES protos:
SNES mega man x3 prototype

SNES fighters history prototype

Game Boy protos:
hexcite gameboy game boy proto

Flash…

…and EPROM!
Nintendo promo item & game:
NINTENDO Gamecube – Promotional magnet toy

Looks funny!
GB lot with Kirby’s Pinball Land demo
Two rare and chap (at leas now) G&W:
NINTENDO GAME & WATCH YM-901S SuperMarioBros NIB
Great shape for the most known rare G&W. Competition prize for the Japanese market.
Nintendo 1980 Time Out Toss-Up Game and Watch
NES Test Station for Authorized Centers:
nes test station

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Atari!
Atari protos, test & sample:
Atari 1400XL Prototype Computer System & Schematics

Working hardware proto!
Atari Deflektor XE Supercart Test Cartridge for 8-bit Atari XE/XL/800

Atari 2600 Prototype Test Unit with 29 Chips

SALT Rev 2.7 Authentic Test Cart Atari 400/800
Towers II Atari Jaguar product sample
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Satan’s Hollow arcade chips, sold as proto:
SATAN’S HOLLOW EPROM ROM SET PROTOTYPE Arcade
Proto or not?
Today’s search it’s very proto-oriented!
