Original Game Boy

Nintendo's 1989 gray brick sold 118.69 million units (including Game Boy Color). It survived a Gulf War bombing — the famous charred-but-still-playing unit sits in the Nintendo World Store. Sealed original Game Boys now sell for $1,000-$5,000 depending on condition. The real money is in sealed first-print games: a sealed copy of Tetris (the pack-in game most people opened) sells for $500+. A sealed Pokemon Red or Blue can hit $10,000-$50,000 at heritage auctions. The Game Boy proved portable gaming wasn't a gimmick.