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?
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.
Who cares. It was my oldest cartridge from 1968 and suspension was just fine, hard to believe, but it’s true. Some people have no clue what they are talking about and never had a first hand experience with some of the best cartridges ever made (if they are looking for new high-end cartridges only). I have extremely positive and rather unique experience with over 50 top vintage cartridges since that day, I want to mention only a few MC below: 

In the late 1970s, Haruo Takeda started designing OEM products for many foreign companies, some of the most well-known among them being Krell, Cello and Mark Levinson. It was at this time that Takeda San also started producing cartridges under his own brand Miyabi.

Takeda San says, "I was always frustrated by modern cartridges - including my own designs in the past -because they always sounded clean and nice but failed to present a very important element of music. What was missing was the linearity of dynamics. Many cartridges can produce clean sound but the sound is only one element of music. They fail to present the flow of music. Listeners may not realize this if they are not familiar with music that requires a wide dynamic range and delicate gradations within it. Large orchestral works and certain piano recordings are typical examples.

Miyabi MCA is low output (0.25mV) and low impedance (4 Ohm) Moving Coil cartridge with PH Semi Line Contact stylus tip. Frequency response is 10Hz - 50KHz.

The cartridge uses Alnico magnets because Takeda San likes the sound of Alnico: “It is firm yet not nervous”. The other materials in the cartridge are chosen to achieve certain results in combination with each other. Huruo Takeda says: “I don’t ship out my cartridges right after their construction. I always listen to them for a couple of hours, make any necessary adjustments and then let them sit for about a week. I then repeat the same process until at least 20 hours of listening sessions have accumulated. So it usually takes 2 - 3 months from the construction of a Miyabi cartridge to its delivery. This is a bit different from what people call break-in.”

Haruo Takeda has made his last Miyabi cartridges specifically for the Japanese company 47 Labs before retirement. Now all his cartridges are very hard to find, but Miyabi MCA is one obscure vintage model, most audiophiles never heard about it, here is mine (Miyabi MCA number 40). And this is my Miyabi Standard. Those are State-Of-The-Art cartridge from the golden age of analog.