My $0.02.........I have a python from the custom shop that my wife bought for me in 1980. 6" royal blue. Single action is great but I've always hated the stacking on double action. TWICE over the years I've had to remove and peen(stretch the lower leg) the hand to get it back in time. The actions are fragile and will go out of time if shot alot. So I've had mine 34 years and for the last 6 or so it sleeps in the bottom of my safe. For my use my Smiths are much more durable and fun to shoot.
BTW My son is a Colt collector. He has 3 pythons among his other colts. He treats his colts like fine china seldom carrying them in the woods or hunting.

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S&W Accumulator