Sounds like a sound gun with only minor problems. Unless there are some other major problems yet to be found I suspect that the $3,600 estimate is very reasonable. Try to find another Parker 20 with 30" barrels on the web for less than that much or even a grand more. Add a nice leather pad and fix the guns other problems and you will have maybe half a grand more in the gun. But you will be hard pressed to find that gun for less.

Case color for a field gun or a shooter is over rated in my book. Collectors worry about % of case colors not shooters. We worry about getting enough time off to enjoy the gun and hope that we have enough bullets when we do get to play. Collectors worry about pristine condition and making sure you put on a pair of white gloves before you handle their guns. Like living with a old maid aunt with guns instead of antiques.