What's the best and/or favorite piece of equipment you've owned? And do you still own it?

My Macs, C20, MC240, I've had a few. This pair though, they were made for each other Though I'm REALLY liking  the Cary V12r, I've been tinkin' with over the last year. This is out of 45-50 different power amps, and preamps

The speaker, I currently own. VMPS RMx Elixir. and a few that I've made
and kept , and or still working on..So there is 10-12 pairs, 3 pairs unfinished, CLOSE though...COLUMNS.... Everything else GOES.

I keep a cool 1/2 dozen to a dozen  Russco, QRKs, or Spartas, for TT project every now and then.. Garrards are too expensive. I like Thorens too 124...a little more reasonable.. FUN stuff. easy to work on, and sound good.

I lost a Fairchild 750 all dolled up.. I was pretty sore about that one.. I would have never sold it... Was stolen... I still cant figure how they loaded it up. 250 lbs..

Regards

Anything with copper....

Quartz....

Shungite....

:)

My dac Starting Point systems is irreplaceable soundwise and moneywise....I hope to own it till my death...

Oh yes MC, Joe Weber at Corner Audio. Spent lots of money there, Joe got me into high end audio.

Ohm Walsh speaker owner since 1982. 
Two pair currently.  

It is not my best component, but it’s my favorite component, largely out of nostalgia: My Thorens TD166 MKII turntable. I still own it and use it. I bought it (with my parents’ help) in 1977 or 1978, at Audio Consultants in Evanston, Illinois, while I was still in High School. After 15-20 years in storage, in 2018 I brought it back into the Audio Consultants shop, had it serviced and overhauled, and a new cartridge (an Ortofon 2M Bronze Verso) installed, and put it into service in my system. It was great to see the owner Simon, who sold me the turntable so many years ago, in the shop. While getting the turntable sorted, I also bought several new components from Audio Consultants to get a great 2-channel system up and running. Simon has since retired, and Audio Consultants is now closed, to my sadness and dismay (but happiness for Simon). This may not be a top of the line turntable, but it still sounds great. And, I was loyal to that shop for more than 40 years, having bought many things there over the years.