I do think we should at least use the same measure of time to compare. Even if that means one reaches $0 by the time the other reaches $150.

Macs do generally hold their resell value better than PCs, but that doesn’t necessarily have any correlation to usefulness.

I have bought several ThinkCenter small form factor PCs used for about $200 each, and they’ve each been about 5-7 years old. They’re perfectly fine and I can even get new parts from Lenovo, depending on the part and machine. Fantastic deal. They run loads of services in my home.