@mylogic -
Yes, and that is a problem that many hobbyists in many genres are simply blind to.
Speaking for myself, I have always tried to keep the mentality that I am involved in a hobby for the interest I have and for the pleasure it brings me... and that any financial gain that MAY come about (flipping equipment, etc.) is to be looked at as temporary, individual transactions that turned out in my favor... and NOT as part of some "investment strategy"...
I just see many, many of us out there who think their stash of audio equipment (or that rusted out 1960s car under the tarp in their driveway, as another example) is the literal equivalent of bars of gold - and it is a given that their "gold" will always be in demand, and always appreciate in value. And, furthermore, anyone expressing ANY other opinion is simply someone who is "just trying to steal my precious..." (say that in your head in the voice of Gollum to get the full effect, LOL).
While I acknowledge that TODAY your equipment definitely has at least some value... the notion that A) it will still have value tomorrow and B) that value will be greater than it is today... is nothing more than a gamble. To believe otherwise is just stubbornness; and (to an extent) greed.
And the expectation that any heirs you ahve are going to curry up the same level of interest or enthusiasm is simply ludicrous.