We went to Longleat last week. Apparently Nico, the 50 year old gorilla, got a 32" flat screen TV for his birthday. This should give you an idea of how valued CRT TV's are, but then Nico watches a lot more TV than you. They won't be digital either so would need a set-top box to actually watch broadcast TV on. So I'd say local recycling place.
A thought though, do you need a TV licence for an analog TV as you now can't actually watch anything on them without using a set-top box now there's no analog broadcasts? An ideal companion for your Betamax then.