how rare is a 63 valiant convertable signet 200?

I have a 1963 plymouth valiant signet 200 and have been doing some research on the car and can't find out a whole lot. I found the production numbers for the year, but almost never do they talk about the signet 200. From what i understand is that it was there top of the line model back then and they came with all the extras. But they cost more so they only made about 1800 of them. I even found a site that said there calculation showed less then 200 were even known to exist. Could this be true? How rear could this car really be?View attachment 004 (2).jpg

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