Pretty unlikely to find a second hand system with the highish specs I’d want.

But if you mean if someone just needed a computer, then yes used would be much cheaper given how quickly things advance.

Pre-built computers. I’ve just been building PCs for so long I can’t imagine buying something that meet my specifications within a reasonable budget. And it’s fun.

I’m just saying it’s more feasible than mirrors. Not that it’s actually feasible.

Would be cheaper just to launch the solar panels.