Recently there has been a big debate about how many vinyl roof wagons were really build. I personally have seen around 50-60 of these cars. There is a guy claiming that each brand made 20-50 only per year. Of course there is no proof that I have been able to find on this subject
I know not a lot of them. I did see an uber rare Buick go on e-bay about 8 years ago. Low miles with the vinyl roof for ungodly cash.
Looks and sounds like a great Caprice Estate you have there, Bowtie. Post more pics when you have a chance!