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

Speaking of tonearms: I have a NIB Mayware Formula 4. Back in the Days of Yore (1977) I had the Australian JH copy  mounted on the Ariston RDII Superior TT with a Microacoustic 2002 electret cartridge. This was a particularly nice sounding set up! 

When writing my post for this thread, I probably should have been clear to indicate the purpose of my question was with a view to sell the NOS items I originally obtained for a second vinyl system project, but have now changed my mind.  At the same time, I didn't want to appear to "sneak in" items for sale via the question, so I just asked the general question regarding the current market for items such as I've mentioned.  Sorry if I've wasted anyone's time by the lack of clarity.   Yet, the feedback and responses thus far have been helpful, nonetheless.

What you got then? 

Dear @nolojunko : Always exist some interest in NOS audio items ( vintage ) but you don't need to ask/thread for that you just need to put an advertize here in Agon site and you will have first hand experiences about.

Agon gives you the opportunity to put on sale even through an auction or other alternatives to your items been sold.

Here in Agon are several audiophiles that can be interested about including me, just disclose it through an Agon advetize.

Regards and enjoy the MUSIC NOT DISTORTIONS,
R.

The difference between audiogon and better platforms like ebay and US Audio Mart is the listing fee. Nobody charge listing fee, except audiogon!

On Ebay you pay fee only if your listing is sold.

On US Audio Mart you don’t pay anything at all in any situation even if you sold your items. It’s free platform and extremely popular.

Another new platform is Reverb.

But Audiogon will charge their free just for listing, they want you to pay them even if you item remains unsold (and most likely it will be unsold for a long time). 
Auction is very bad idea for beginner if you don’t have followers and feedbacks, your item can be sold with very little interest for very low price if it will be an auction.