Gentlemen; Today I saw a six inch blue Colt revolver marked either Trooper or Lawman but it had a Mark IV on it and was chambered for 22LR. Would this be rare in 22? It was like new and he wanted $350 which seemed low to me. All the other Lawmen or Troopers I've seen were 357. I would appreciate your input as he took it back to the shop with him.