I think it all depends on the prospective buyer-- Blues and reds W/WO stripes , seem to be the defining colors for Cobras--seems every other car for sale is a color clone of the next one for sale--go to any Cobra gathering--most cars are blue or red
If the cars are of equal quality/build some buyers may prefer a different color--Black, White, BRG because they want to be different than the rest of the herd
I chose white/w blue stripes and roundels--I wanted a Cobra with a little different look--maybe I'll have difficulty selling it--maybe I won't--
All depends upon the prospective buyer
PS BNL's are in a different category all together--can't wait to see Pat's BNL