1972 triple black badboy (FACE LIFT)

OK, so you say you want to sell your car. If that's the case, here's an opinion you've gotten before but with a reason you haven't heard before:

Leave it alone without a stripe in order to maximize your possible buyers.
Why?
If a buyer likes it without a stripe, they'll buy it. If they'll like it better with a stripe, let them put the stripe on. That way the new buyer will pick the color stripe he wants.
If you put a stripe on it, you're going to reduce the number of prospective buyers to only those that like the new color combo.

Good luck with your sale.