Still, if a total SHTF situation would occur and government fiat is worthless, I would assume the gross weight of collector gold coins would matter over the original purchase price.
I have been a gold bug since I was young - and now I'm old.
And I still believe the central mantra of goldbuggery - the price of gold never changes, it's the price of dollars that changes.
However.
The notion that you will be using gold as money after SHTF needs the following reality check (which plays into why I am no longer a libertarian): The first time you exchange a 0.10 oz coin for a loaf of bread, and unless you are an upper-tier Navy SEAL in terms of your personal fitness and aggressiveness, you are signing your death warrant, because the fact that you possess gold AT ALL will become common knowledge within minutes.