Interesting. I still have a bunch showing on my local Facebook Marketplace, but who knows what shape they’re in plus it probably varies a lot from city to city.

I can well imagine that it’s gotten expensive finding a quality one (eg trinitron) of reasonable size.

They are truly dying out. Wish I'd kept my color c64 monitor -- it would probably be worth a lot now (or at least would be awesome to use for retro purposes).

They don't show up in second hand shops because their value is essentially negative. If it doesn't sell, you have to pay to dispose it.