Practically a steal when you consider that

When you purchase a physical piece of the Esc Keys collection, you will also receive the corresponding digital artwork inscribed on blockchain.

Inscribed! Right on the blockchain!

As keyboards have become a ubiquitous part of life, forever changing the way we work and communicate, Susan Kare has shaped that visual language. As a prolific graphic designer, she has designed the landscape of user interface design much more than can be quantitatively measured. Starting at Apple in 1983

Emphasis mine