We don't have production numbers as Glastron's records were destroyed in a fire.
There are a few around. Doug in FL has a buddy who's rebuilding one, I owned one and there are a couple more in the FB groups.
Typically, they're not worth anything more than any other used boat. Cool, yes...rare (meh), a CVC-18 is rare, CV-23HT rare'ish, but a CVZ-19, not really rare...more uncommon then rare.
There's usually a couple for sale every year.