Hi Frank, for someone who is buying a Tbird as an original car, it might make a difference. If someone is not an originalist, it will probably not make any difference, IMHO. As I recall, Dusk Rose is considered to be somewhat of a rare color though. That could have an effect on price. I would say that if you like the color that it is already, keep it and get a good paint job on it. As Alexander, the founder of our Forum used to say... "You paid the money for it, so you get to do with it what you want to." Here is a link to your 1957 that you might find interesting.