WHY...are there so FEW tv's..from the late '60's -to mid-80's STILL AROUND?

[sampson159]

other than zeniths,i often wondered about that too.we had the largest sylvania dealer in the country.they sold 10 sylvanias to 1 other brand.everyone had a sylvania here.where are they?you will find a chromacolor 2 occasionally but thats about it.