My question could be either. I don’t believe the open markets you experience today will exist after a short period of time in a true failure of civility. “All markets are based on voluntary transactions between free individuals. As a buyer, I am willing to pay black market price for the item in question. If I don’t like the price, I don’t buy. No one in the black market has ever “forced” me to buy their products.” And probably not just taken what you have either.
Toby anticipates dealing with criminals in control of resources and I believe that will transpire. Gaining the trust of a criminal or they of me is not how I want to spend my time, nor do I advise others to do so. It is a Pandora’s box. edit:I’m not giving you armchair advice.