Christie's auctioned off an APPLE-1Personal Computer (pictured above) for $390,000 on Tuesday. - 

Christie's auctioned off a Apple 1 computer -- one of the world's first Apple computers -- for $390,000 today. Not bad for a clunky old keyboard and vintage chips attacched to a piece of wood.

Why was the price so high?

Dag Spicer, senior curator at the Computer History Museum in Mountain View, California, joins Marketplace Tech host Ben Johnson to explain.

Follow Ben Johnson at @@TheBrockJohnson