I need help in the value of this S&W 44 Magnum s/n S165617. It was factory serviced in 1980,fitted a new cylinder and reblued. The old parts were returned to me,and i still have them along with the original invoice of work performed. I know the refinish takes away a lot of value,however the finish was as good as gone,and the value was already questionable. Sorry for the poor pics as I am not good at that,the dust and lint shows up worse and the gun looks better then in the pics.