Sidetrack here on the porting issue. I own a 3" 66-3 lew horton special that comes ported. One of a 300 run. When the performance center does something the price is through the roof. You have someone else do the same thing and it cuts value by half.
Along the same thinking, commemortives: Usualy a given model S&W or colt, also winchester will take a standard model, give it a higher grade polish and wood along with gold filled engraveing, the gun has to cost more than the standard model to produce. Yet when sold used/new they usualy go for less than a regular beat up well used model!
Us gun people are funny/strange sometimes!