Go to the Colt Forum with Picts. Those guys know everything.
By my measure, it should deduct from the selling price but there are many factors that need to be evaluated and more than one way to recrown. I have recrowned a number of firearm but have never gotten over my head. I've even had to recrown a few new firearms. I print the crowns as needed. .......How much should crown and muzzle damage deduct from the value of nothing special shooter grade SAA?