"How do you by small things with a gold coin. You can scale up or down with ammunition. One .22 round or a box of .223. It could become the most valuable and practical barter currency."

I would add that silver is more valuable than either because it can serve as both currency AND be fashioned into ammo.

There's an overstock of useful idiots at the moment. I'm hopeful we can reduce the inventory before it's to late!