The "DUINOMITE" is 20€, but it's based on a 32 bit CPU, even though it sort of functions like an old 8-bit home computer.

I think their claim of cheapest for this Agon light is because a 8-bit home-pc style computer is such a niche/purist space.

https://www.olimex.com/Products/Duino/Duinomite/DUINOMITE/op...