As above, and it is pretty much the same with regards to other forms of collecting when it comes to the older items, a lot of "younger" end do not relate to things of our yesteryear as some do.

If you watch the car markets, the ones worth having that appear to appreciate like crazy at present are the the fast fords and the european GT's etc. fewer and fewer of us older end around that still appreciate history going back to the turn of the last century, the middle aged are revisiting their youth.

The oldest gun in my collection is a 1924 Belgian 410 shotty with others from 50's and 60's , my "modern" ones are from the 80's.

At the end of the day tastes inevitably change with each generation, which is good as it also serves to save the next generation of collectables.