What's the market these days for NOS 70's/80's cartridges and/or tonearms?


I've noticed the market has seemed to change with respect to a lot of vintage gear.  However, it used to be that certain vintage gear, especially if NOS, such as the Pickering, Shure, Stanton cart's and perhaps SME tonearms never went down.  I'm getting some indication that this may no longer be the case?   Yet, recent searches hasn't turned up any useful data.  Any ideas on market or sources to determine the market?
nolojunko
And my post about high listing fee charged by audiogon for every listing, even after I paid that fee myself several times in the past (while other platforms never charge listing fee), was removed by audiogon moderator. Posting truth is prohibited here.

@ebm  

All that stuff is history the market is 0.

Zero? 

You are an expert as I can see. 

Watch final auctions for vintage high-end gear on ebay, the prices for some old stuff are higher that your curent setup. There are turntables that cost over $100k, tonearms that cost over $10k, cartridges that cost over $5k and so on and on. Everything made 30-40 years ago, but still NOS. Huge market, especially in Japan.
I have 3 Technics Epa 250 NOS rods never opened in their unopened packaging; I bought them many years ago from a shopkeeper who closed his shop at a ridiculously low price.

https://i.postimg.cc/15ChjP33/1.jpg


I think that in a little while I could get a great deal .... but the whole market is really crazy, it’s not worth buying anything or a few vintage products anymore; the market is drugged and drunk!