And I have an old iPhone 6 in my drawer that is also "worthless" but still completely usable. Heck, your old watch is just as useful to you now as it was 7 days ago. You're looking at this all wrong. Short of exotic electronics (e.g. McIntosh stereo hardware), these will never be investments. If you want something to strap to your wrist for the lowest possible outlay, then by all means, do so. But if for the next three years you want something that you really LIKE ->the feel, look, weight of it, strapped to your wrist and you actually enjoy putting on each day... than that's a completely different story and you should make a decision accordingly.
I am not making judgments or casting aspersions either way, do what is financially responsible. But the idea of "value" and personal wear article cost frequently do not align in a way that makes sense on a ledger sheet. And that goodness for that or this would be one dull grey/brown society to live in.
My thoughts, YMMV.