The number of playable B&W Televisions ...

[Steve]

I think there are far more early B&W TV's in good working condition now
than in many years because of collectros/restorers like us. Sets made
in the 1950's and later are on the decline because
they are not collectable. At least right now. One exception might be
the small pocket TV's. I know I've picked up a few dozen of these just
beacuse they are dirt cheap, small, and you have to admire the
engineering that went into them (IMO).
Steve W6SSP