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Like in Venezuela, people are bartering for needs. The important things that are sought right now seem to be food and medicine. But at some point, people will be wanting a “taste” of their former life. They will want something that reminds them of the life they had. It could be as simple as a piece of chocolate or a nice new dress. The important thing here will be timing, security, and perception.
Many prepper fiction novels eventually get to a point where there is a barter economy or the characters visit a Trading Post. For instance, a trading post plays a prominent role in Mark Goodwin’s series, Seven Cows, Ugly and Gaunt: A Post-Apocalyptic Saga of America’s Worst Nightmare. In the novel, the characters use silver to purchase the necessary items to survive and make life easier. Goodwin’s novel is a post-apocalyptic EMP story. The poop has really hit the fan in this one!
An alternate currency, denominated in labour time, would prevent profit taking by middlemen; all goods exchanged would be priced only in terms of the amount of labour that went into them as expressed in the maxim 'Cost the limit of price'. It became the basis of exchanges in London, and in America, where the idea was implemented at the New Harmony communal settlement by Josiah Warren in 1826, and in his Cincinnati 'Time store' in 1827. Warren ideas were adopted by other Owenites and currency reformers, even though the labour exchanges were relatively short lived.