...do great speakers increase in value over time in the vintage market?


Hello to all...

I have a pair of JBL L25 "PRIMA" speakers, made 1972, case in 7/10 shape (not repainted), surrounds on woofers reformed several years ago, grill cloth replaced several years ago, includes JBL badges on speakers. Original 1972 price $169/ea. 

Recent searches of this speaker in the vintage market show prices 50% OR MORE than the origional issue price: ???

Is this that good a speaker design? - I have read comments saying it his/was one of the best speakers ever made by JBL (at that time?) - and I do luv their sound (which I now wonder if I've ever really heard them?) especially with well-recorded jazz and have the ability with little power to ROCK OUT!

(Would greatly appreciate any comments by those who have/had these over the years...)

DO GREAT SPEAKERS INCREASE IN VALUE OVER TIME, or do/should all depreciate in value...
insearchofprat
What color are these bad boys anyway? Mine were yellow with orange grills. They came in 4 or 5 colors. I was watching and got mine when they were marked way down. Plus mine were store demo. I said hey what about this nick on the grill? Bottom corner, barely visible, but good for another $25 off. Well you have to be careful with your paper route money, you know?
No they do not, Not at all, This is a  post CV19 world,, a  place in time, in which whatever you buy, (excluding houses of course) after payment,, = loss in value automatically. 
Its the CV19 epoch. 
lets say i adda   2nd speaker system the SEAS TRYM at $2K. 
I don't like it vs my SEAS Thors,,list it here/ebay,, best offer,,might fetch $1200,,if I am lucky. 
I have plans to buya  new cayin SC6 pre,,,if I don't like it , will sell at a  30-40% discount.
So answer to your Q is , no, buying anything new today, resale is at a  discount.
Actually no, that has nothing to do with his question. The degree to which you have misconstrued it is however hilariously impressive.
millercarbon

My JBL L25s are creamy white with (new fabric) orange grills, always listen with grills off, set at zero on the High Frequency level. Speakers were reformed several years ago; using 14g solid core copper wire twisted, with bare ends, as speaker wire (may experiment with lampcord at your suggestion... )

Wonder how not being mirror-image affects sound dispersion. 

Presently powered with a low-powered tube intergrated by Monoprice (alternates: use the integrated as a pre, with a Parasound HCA-750A, and play around with the Parasound direct with the output controls on the back of the unit)

Anyone want to buy a mint pair of Realistic Minimus 7 Speakers in white for $700? They were such GREAT compact monitors! So much better than all the wooden boxes now! Guarantee you would like the sound better than Harbeth! Use lamp cord to put them with a Realistic era receiver and you'll be living the dream (in more ways than one)!  ;)