My answer in the other thread:
Well, there were less than 200,000 built. How many are left is hard to tell. Most of them were built in the first 4 model years, so, about 40,000 '86s. A lot of the 2.8 liter trucks have had engine problems.
Rare? Probably not. Common? Not Even.
Post up your own VIN in the registry, you will get your build sheet.
Even if it's not rare, it's worth preserving. The Comanche was easily the best small truck available at that time. Personally, I think the concept still holds up well. There isn't anything comparable available today, which I'm(NS)HO, is a shame.