I don't think any true enthusiast cares what the car is worth , myslef included or I would have taken the porfit on the car.
I notice the owners here have owned their car for some time and most of us are constantly taken aback by how Datto's have gone from cheap little cars people bought because they couldn't or wouldn't afford a "real" enthusiast car. (remember the TR6 tosser on here a couple of years ago) Now regular car folk see them as a legitimate classic.
My thought on this post was more of; 510's and Z cars have had a mainstream cult following for at least 20 years, so those cars have been preserved, 1200's up until recently were used abused and crushed. So we were thinking with less of them they will be more sought after.
The attibutes that make 1200's great are still there; Light good handling and cheap to operate. Like most 1200 guys I've kept enough parts to keep my going another 20 years so my running cost are still dirt cheap.

Now I'm still having trouble with the guy who came up to my 1200 at a track day and spent 15 minutes taking pictures of it and the gal who came running over from her husband's Porsche to check out the 1200. Of course if Datsun is ever a featured make at the Monterey Historics..........I'll be playing up the "snob" appeal of 1200's for sure.

Tom