German auction house Breker (via ComputerWorld) is set to put a working Apple 1 on auction later this month and it may fetch between $240,000 and $400,000. There are an estimated six working Apple 1 computers in existence.
As noted by AppleInsider, the record price for an Apple 1 was $640,000 at an auction in December. Last August, a non-working Apple 1 headed to auction with a much lower $125,000 estimate. Before that, another Apple 1 fetched $375,000 at Sotheby's auction in New York.
The Apple 1 was originally priced at $666.66 when it was released in 1976, with only 200 units produced. It's believed that there are roughly 30 to 50 still intact.
Article Link: Rare Working Apple 1 Computer Headed to Auction