This is what Microwatt is intended to address, though you have to synthesize it yourself. With luck Arctic Tern will give you the playaround board you'd like. https://www.talospace.com/2021/10/first-flight-of-kestrel-fp...

Catch 22: Either the hardware could still be used in some system, so used stuff is expensive because some companies pay through the nose for spares, or the hardware is way too old for that, in which case it's an expensive collector's item. If it's very old and common it goes in the crusher.

This seems to be universally true for all kinds of UNIX workstations and servers.

> If it's very old and common it goes in the crusher.

Repeat until the hardware is rare and worth something?