Released in 1971, Computer Space was the first commercially-sold coin-operated video game. Essentially a variation on the digital computer game Spacewar!, Computer Space was created by Nolan Bushnell and Ted Dabney who would go on to found Atari the following year. Two units just sold on eBay: a rare yellow model that went for $3000 and also a two-player (but not entirely functional) green version that sold for $1500. That yellow one would have gone perfectly with my Fender Rhodes Student Model keyboard. (via Technabob)