I own three tube amps and wouldn't consider selling them. I also own solid state amps, but find myself playing my tube amps more often. What I enjoy, other than the sound, is ability to roll the tubes to achieve a more refined or different sound which you can't do with solid state amps. Just my two cents.
Don't sell your tube amps
Although this was an article in a guitar Magazine, I thought it might interest those who own stereo tube equipment:
https://www.premierguitar.com/gear/amps/dont-sell-your-tube-amps