Having bought and sold a fair amount of Bronco NOS, I've found that the funny part about NOS is that it is only worth a mint to those who know what is is, need or want it bad enough for the right project, and are willing to pay for it. Get all three, and there is a lot of money in it! Without, it is sometimes worthless to most people.
If this is crazy, then what does that make paying $500-$1000+ for a USED roadster mirror that were surely more plentiful?