This paper documents the remarkable experience of the Far West mint producers in the operation of their marketing order. From 1993 to 2002, the marketing order witnessed a dramatic reduction its share of the Scotch spearmint market, as well as a reduction in both its price. We apply a model of a cartel facing a competitive fringe to describe the fall in the marketing order price as a logical consequence of increased world production of spearmint oil. We estimate an econometric model of the marketing order price and find that a 1-percent change in the marketing order's market share corresponds to a 0.8 percent change in the marketing order price.