Most TVs like that are still in people's houses so it's really hard to find them out in the recycle market. It's not impossible, it's just not as common to find anymore. I usually come across crap sets that I'd prefer not to decorate my house with. If I can find a decent phillips, sony, or toshiba set out in the wild, I may snatch it up if I can justify it.
My second hurdle will be justifying purchasing a tube set to my fiance and soon to be wife. She's cool with my game hobby/collection but she also keeps my spending in check.
You'll all be the first to know if I pick up a tube or a crt monitor sometime later this spring/summer. Till then, I'll just have to make do with controller setup only.