I have owned a 6" Colt Python for over 40 years. I have used it in bull-eye center-fire league and I have used it once in practical pistol (PPC uses barricades but no movement) where there is not a barrel-length restriction. Speed reloading has been an issue for me. I have seen some incredibly fast You Tube stings of fire from a Python with a reload and I would like to develop my skill. I would also like to stay with a Python in defensive pistol (IDPA requires concealment and limits barrel to 4.2"). I have considered trying to swap my 6" Python for a 4" Python, but I perceive that there would be a premium on the 4" models as they seem more rare. What do you think would be the expected additional differential in price to swap a 6" for a 4"? I don't know the standards for rating "wear and tear" but I'll summarize. My 6" has the original grips, box, owners pamphlet, etc. There is no corrosion and no wear except for the line around the cylinder. I would like a 4" shooter, so I'm interested in good lock up but no concerned with cosmetic wear. Regards.