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Underground economy anyone?
Unless you're importing drugs or manufacturing fake IDs, as sanctioned by the government, the currency thing makes grey/black market ideas less attractive. I've thought about how that might apply to firearms. The logistics of it make it easier to import AKs off the same Chinese/Russian ships floating off the coasts that offload the drugs or make the furniture..
I wonder if they still do it that way, or if 9/11 made it easier to just have the stuff muled north across the border?..
(I'm old. My observations are from 30 years ago. What do I know. I'm happily "out of the loop"..)