A functioning Apple 1 computer has been sold at an auction for $374,500.

The Apple 1 was the company’s first product. Only 200 were created. Each was hand-built by Apple co-founder Steve Wozniak.

Experts estimate that maybe a quarter of those still exist – and only a fraction still work. The original cost was $666.66.

The sale price was more than double what Sotheby’s had estimated.