I disagree. I believe I have done much more than find a small exception to the general truth of no buying and selling. I believe I have pointed to a way that a person could buy anything sold at a local Walmart, it would just cost more.
I'll flesh out what I'm thinking a bit more.
Pawn shop owners tend to be wheeler-dealers. Suppose I go into a pawn shop and say that I have these sincerely held religious beliefs that prevent me from using the Fiat money system, but I have these gold coins. He has a puzzled look on his face, but he's listening because he sees the gold coins.
First I will give him a 1 oz coin worth about $1,500 and my Walmart shopping list. The stuff on my shopping list comes to about $1,000.
All he has to do is go buy the stuff at Walmart or even order it online. When he has the items, I will come pick them up.
It should be an easy sell to the pawn shop owner because he is making $500 with no risk and little effort.
The reason why Walmart itself doesn't just accept the gold coin and the reason for the look of puzzlement on the pawn shop owners face is that virtually no one has the religious belief that Fiat money is sinful.
Which brings me to my next question. I have seen on this thread that according to your interpretation of the law of Moses, Fiat money is wrong. Have you discussed that in detail on this thread or somewhere?
Of course there is a second step. Even if the law says that Christians shouldn't use Fiat money, I am not convinced that Christians are to follow the law. I believe we were talking about that on a previous thread. Did you want to respond to my most recent reply to you there?