I just purchased a 4" Nickel Python that the owner said was unfired. Serial # 390XX indicates mfg in 1964 if I understand the charts correctly. I can see no evidence of it having been fired but then I am not an expert.. Was in a plastic Colt box which I assume was not original in '64. Was 1K too much? He also had a blue 8" for $800 which looked like new.