One of my former jobs was inside a Recycling company like this.
I was testing monitors and printers that came in, and sorting other pallets of odd junk.
I remember we had to grade the display and case, by certain criteria.
I believe they were shipping them to overseas buyers, in mass quantities.
I think they tried to sell some of the A grades individually... but there was mountains of these things. An entire warehouse filled with pallets of monitors that I think we ended up stacking about 4 monitors high with cardboard separation, and plastic stretch wrap.
The main company that fed them was huge... so it seemed endless.. but eventually they burned bridges with them, due to not Zeroing out Hard drives, as was a critical requirement of their contractual agreement.
Im pretty sure that anyone can find CRTs locally with little effort. A lot of pack-rats keep them in a pile, but local e-cycle / recycling places should also have masses of them, much like this same place does.
Also, check into local "Surplus" shops... as some might carry some interesting and reasonably priced misc. stuff.
I once picked up some cheap heavy duty casters for a few dollars each. Another time, a guy let me take apart a unit made of that
precision Extruded Aluminum railing. I think its called 80/20. (but this stuff is actually thicker and more robust) I think I paid under 100$ for it all, with all the hardware and angle connectors. He said that I probably had over a thousand dollars worth... if it were brand new. If I ever get myself stable... I want to make a highly accurate panel-saw out of it.
A CNC would be another great use... but Im not sure I have the skill, time, and money ...to attempt it.
Junkywards / Recycling yards are cool too. Ive only ever dropped off scrap materials, but Im sure you can get parts and pieces pretty easily from them.. for very little money (and or taken off the money you would have gotten for a scrap load drop off). Just bring some heavy duty gloves, and some tools... to take things apart.
Im sure I could get hold of CRTs here.. but shipping them would be a real challenge, and quite an expense.
You would need a lot of heavy duty foam, to try to keep them from breaking apart, on the journey.
And of course.. there is never any warranties. It could die in two days... or last another 10 years.
You never know how long its been kept on, if it has an intermittent problem already, and if it was/wasnt made with high quality components.
I bought 2 Pixeltouch CRT Kiosk Monitors on some deal that someone linked here... ages ago. Ones picture wasnt that good... and trying to repair it myself (re-flows), I think Id made it worse. The other was great! It was as big as a std. arcade monitor, with a heavy metal frame.. and it had a high resolution that was unheard of (over 2000 pixels horizontally, if I recall). Literally unusable in its max-res.. as windows text would be so small that you would need a magnifying glass to be able to read it. Very impressive though... and a great picture.
It lasted maybe 5 years of constant use, before it finally pooped out on me. I seriously thought about having it professionally repaired... but didnt have the money nor the time. (had to move)