Traders all sell useful tools except man 4, and man 6, who sell luxuries. The value of one luxury is zero, and the other is negative. Prices are initially zero, and are set to just prices after 200 days, and then set to costs after 500 days.

In this case, when just prices are set, monetary inflation sets in. It is cured when prices are set to costs, and debts are paid off.

More about the applet