Funny, I just ran across a 4" nickel Colt Trooper MK III and the asking price was $650. I am no expert so I consulted with one of the experts on the forum and he thought that was a good price given the finish and barrel lenght. I only saw pictures and there was a faint line on the cylinder. I might see in person if I do not go to the KY Speedway Saturday. Interested, but really need to save for a Python.