I think that is the general consensus - that old axes are now overpriced. Plumb made lots of different axes - the one you saw may have been in the "boys axe" category. If that's your interest, have an idea of what the axe head originally looked like. I've seen some plumbs for sale that are very worn from a long life of sharpening - I could see the difference. Your hytest does not look worn. I think howling dingo has an interest in old axes. You might be able to show him a photo of something if you're interested in it. You could make an offer of what you would be comfortable paying for it too.I went back to the second hand store today and had a look at the other axe they had there. Sure enough it said plumb on the head.
Small head though , near half the size , and they had 65$ on it.
Maybe they're aware it's worth something.
On my first visit I thought it was expensive for an old axe.
Probably be treasure to someone out there.