I have Stax Srx-MK3 Pro Pricing


I have a pair of The original Sr-MK3 pro. 
How does one determine value when they are so rare they are not in the blue book and is basically an unobtanium pair of ear speakers.
Dunno. I got the SR-X MK3's & SRD.7 in 1984 for $254.
Use an inflation multiplier and adjust for condition.
If you're trying to sell it's as much as a buyer will pay.
I don’t know if there’s a way to do it online, but a Dutch auction is an interesting option in that it works in reverse of a typical option.  You start offering to sell at a very high price and gradually lower it, and the first person who bids wins.  Anyway, just a thought.  Best of luck 
The SRX-MK3 Pro are a completely different item than the MK3.

Thanks for the response.