It’s not worth gold, a lot of CRTs are dead or dying, the tubes have limited hours. After that, they just become junk. Most have been disposed, so you’re going to struggle to find a local one.

Shipping them is annoying and expensive, no one wants to lug around heavy ass CRTs and larger ones probably have to ship on pallets.

Small CRTs that are easy to carry will get snatched up quickly, but mostly by retro gamers who have no alternative.

The difficulty of finding CRTs is mostly a logistics problem. Not because they are so valuable that people horde them.

Where are you located? I've been grabbing them whenever I see them (roadside, e-waste, yard sales, etc.) for years and honestly have too many. Some of them, like my 36" Trinitron, have become an albatross.