Rare Apple computer could sell for $500,000

Sarah Coles
Apple 1
Apple 1

Ted Perry, a 70 year old retired school psychologist and computer collector, is selling his Apple 1 computer. It's hardly beautiful - and is essentially a green piece of plastic covered with memory chips and hooked up to an ancient keyboard. It has a million times less memory than a typical computer today, and a fraction of the processing power of a smartphone.

So why is it expected to fetch $500,000?