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
I've heard about it too. I think we're all using computers and we learned quickly for how long you can use anything digital until there is an upgrade in software and if your software is not up to date you can't use it properly any longer. In 5-10 years digital equipment goes to museum and new gear gives us more everything. This is progress for sure.

If someone will say this about analog he must be crazy.   
I'm going to list the items for sale on U.S. Audio Mart instead of Audiogon. . . for all the good reasons noted.  Thanks much for the feedback on my post.
Sorry become a millionaire on resale maybe I'm wrong but who really cares not me.
EBM certainly doesn't seem to offer anything edifying to the conversation.  The dumb comments likely produce the opposite.  I'm outta here.  Talk to the hand.
Quality Vintage tonearms are in demand. Ittok, Syrinx, Helius, Zeta, Mission and a few others — SME of course — fetch much more than their original prices after adjusted for inflation.

But not so with cartridges, except the legendary ones. Most buyers in the current market would rather choose from the recent proliferation of new cartridges, with guarantees, rather than take a chance.

All my cartridges are minimum 30 years old, most are 40+, and one is pushing 60, and were all bought NOS, and only one had a bad suspension. But too many people think older suspensions have all failed — mostly due to opinions-without-experience they read on forums like this.