Do any still use an older high end tuner from the past?....

I don’t believe it fits your SOTA criteria but I’m still using my Yamaha T500. And for some reason it’s been a regular part of the rotation lately. Usually my listening leans towards physical media. 

Not high end, but I have my eyes on a Pioneer TX-D1000 but don't know how much I can offer. I'm inclined to offer 50% of new retail price but does anyone here know what the going price is? I don't gauge pricing by Ebay

I’ve got a beautiful fully refurbished Marantz 2220B hooked up right now. It’s a fun looking piece of HiFi history, and it sounds pretty good too.

MX-110 1965 and firmly stuck there frozen in that moment...

I use both a Mac MR67  and a Sansui TU-X1 regularly.  One or the other will be on for days at a time.   My wife and I have music going on all the time. 

Best,
Jose