I think there's a lot of wisdom and insight in all the above. I wish I still had that really great old M-64. I wouldn't take it afield because it was such a great rifle, and I thought it simply should be preserved for posterity, so people could one day see what a really great rifle looks, operates and feels like one day (hopefully) far from now. Just like I love those old PA and Ky rifles of so long ago these days.
Today, if I still had it, I think it'd be one of if not my MAIN hunting rifle. Hunting with it just tastes different than hunting with a more "modern" bolt gun. And I just plain like that taste. Whatever its monetary value was would men little to me. I'd just maintain it well and care for it like it deserved to be treated, and simply use it, but not abuse it. Just like its makers intended.
I have a friend who has a really especially beautiful cusom #1 Ruger that he hunts with regularly, though it cost him over $5,000 all tolled. And yeah, it's got a few little dings and scars here and there. Not many, and not bad, but each one is a reminder of a memory of certain great hunts he's carried it on. And hunting with it has a different flavor than hunting with his other guns. In those times when he's alone in the woods with nothing but that rifle, he can simply look down at it, and get lost in its beauty and functionality, and those tiny "scars" remind him of prior hunts he can become wistful and appreciative about while he's waiting on ol' mossy horns to peek out of the brush. And when he takes one with that gun, it's the culmination of several years of planning and decision making and lots of talent in the 'smiths who made it up for him the way it is now. Any gun we truly have feelings for can accomplish this, of course, if we just get away from the "money rules everything" mentality. I'm really proud and more than a little jealous of those of you who have some really fine old leverguns, and still take them out for a nice walk in the woods. I've had my chance, and I'll take what I've got and really enjoy them, but some of the really fine old guns can't help but evoke some special respect and appreciation from me. The folks who made them put a little bit of their souls in them, and that's what separates the new, machine made guns, from the older, more finely crafted ones. If you can't feel and hear the difference between them, you're not looking closely enough, IMO. Our taste has gotten more plebian over time, and "whatever will work" has come to be the standard of the day, today. But there'll always be those who relish those older, more "spiritual" guns. They really are something special, whether many can see, feel or detect it now or not. There'll always be those who see the difference, even when they become rare. This, I think, is why those older leverguns continue to climb in value. It's the only real explanation that I have for it. Traditions are wounded easily, but they really die VERY hard!