MINT 1970 Plymouth Duster Gas Cap in Plum Crazy Purple?

The chance of the paint matching is pretty much zero so its worth whatever a gas cap is worth.
There's tons on ebay with different color that sold for 100+
The chance of the paint matching is pretty much zero so its worth whatever a gas cap is worth.
What are all the ones of different colors selling on ebay for 100-200+? Guess i'm confused how they would have value but not this one? Thanks for the reply

ps..The rubber gasket has 0 dry rot...Perfect