It would certainly be nice to find that proverbial old, mint condition (insert item here) thats been sitting around untouched for years, for a pittance.
I think this is the core objective and underlying meaning of the OP.
But, really, as much as I would love to have one of each classic, vintage example, how practical is it? Bragging rights are definitely part of it, but you still have stacks and stacks of gear, some working, some not.
It would be such a burden to actually swap out stuff in a system and use it. But, if it makes you happy, then that's fine.
I would love to have, say, a 10B. But not unless it has been recently re-aligned and upgraded. Do I really need a $1500 tuner? No! Do I want one? Of course... Nothing new here.
I have sold off many components before they inevitably needed repairs. They're nice to have, but are eventual money pits.