Dilemma: repaint hood and bumper for best resale value?

It's not my first rodeo with selling a car, but I have a 2008 BMW M3 that has some rock chips on the hood and bumper. I know that repainting any part of a car can negatively effect it's resale value, but the dilemma lies in the fact that the imperfect paint job is also a really big detractor from it's value. There are enough chips and imperfections that would make a significant impact. So the question is: repaint or leave it? It's going to cost me $800 to repaint and blend, but would the expenditure really be worth it?