The colt python wasn't a collectible in 1955. They weren't a collectible in 2005. They are a collectible now though. The market has changed and new guns are stepping directly into a collectors market. The current market for Pythons is what is relevant, not the 50 year stagnation of Python prices prior to the current market.
But the new guns won’t command any collectors premium for decades.... In 5 years from now no one will be paying a premium for a first year gun. More guns will ship this month then the first couple years of production. The rarity of those guns is what makes them special. People paying a premium to be the first person on the block to own the current Python will never be able to sell the gun and recoup that premium.
For some people that’s of no concern and just want to be first. Others seem to think the new Python is some type of investment which is just silly.