A few companies I subcontract for pay a service to take and destroy perfectly good computers. I've seen i5-8400 machines get dragged away, never to see the light of day again.
This can range from just crushing drives all the way to running a hydraulic punch through any non-volatile storage on circuit boards (including flash used for UEFI). This is common enough that most manufacturers will provide a guide to all the non-volatile storage in a product: Statement or Letter of Volatility.
I've gotten some great deals on high-end networking equipment (e.g. Juniper, Arista) by buying boxes that had the SSDs removed & crushed. It's a little annoying to track down replacements, but doable.