We can project that not just Kays, or Engles, or actually any instrument made from wood, will be priceless within a few generations. And not for thier intonation or anything else, but simply because they are made of "wood." We have seen what happened to European "wood" post WW II, then in American forests, where there is almost nothing left (virtually, that can be harvested for good instruments), Alaskan forests, and next, the Asian forests. South America has yet to be fully exploited, but will be just as soon as it is necessary. We don't havae more than a centru of wood left, would be a fair guess. Hang onto anything of reasonable quality for your grandchildren. Even if it says "Kay." Wood for it's own sake will be beyond means for the average fellow. Probably including the laminates of the present generation. In no time at all, the workd can deplete Asian forests. And will. Generation time of good spruce maybe 80 years in the best climates, pine less. Tonewoods? Within 5 or 6 generations of humans, at 20 years generation time, it may well be that anything made of real wood will be priceless, and certainly by 200 years this will be the case. And some of the double basses we have now qualify for the 200 mark.