What a nice little fair weather cruiser it is. Originally a 194 six (that is why only 128 produced), but with p/s, p/b, power top it was a luxurious economy car. Somebody fixed it and put in a 327. The dual reservoir master cylinder is smart.
All chrome present, original upholstery (vital on a '64 SD as nobody reproduces it).
Nice colour too! All in all a really nice car. They are getting more rare as well, there was a V8 swap yellow 6-cyl '64 SD convertible that was submerged in a Florida hurricane a few year's back.

I'd be curious to see what it goes for. Good luck finding another good one, you kind of have to pay what it takes.