I just traded for my third Colt Python yesterday. It is a Colt Python 4 inch nickel from 1981. I has box and papers with it. I am trying to put a value on it. It has never been fired outside of the factory. The cylinder only has burn marks on every other chamber as done by the factory. Any help with putting a value on this firearm would be much appreciated. I don't have pictures on my computer or else I would upload them.