In practice, it's a tiny market. CRTs are bulky, unsightly... and for the most part, really not as amazing as claimed. Plus, they are difficult to ship. Most of them end up in the landfill.
But you have this 50 pound CRT that has to be connected to the right retro gamer. I think mine was small enough to be recycled for free but, over the years, I paid a fair bit to recycle CRTs.
Meanwhile, antique phones, typewriters, cameras, and so on are popular enough that people make replicas: https://www.ebay.com/itm/266280860021