"The party with whom I adventure, The Order Of The Stick had stopped between towns to restock supplies. I came upon a shop that was selling potions at a cheaper rate than I had ever seen. I spoke with the shopkeepers, asking to know how it was that they could sell potions this cheap, as they were selling them for last than the cost of the material components. Because I knew how the potion is crafted, I knew the general costs associated with it. So I knew that their prices were impossibly low unless they had some new source for one of the ingredients. That, of course, could change quite a number of calculations. So I was of course interested. Sadly, this was not the case. The shopkeepers were under the delusion that they could make up the lost profits in volume. I tried many times to explain their error. They decided that the answer was a sale. As they were no longer going to listen I concluded that my conscience was appeased and my obligation was abated. I bought twenty seven potions of heroism for less than half of the material costs. Had I not known what went into making such potions, I would not have been aware of what a deal it was that I was getting, and I might have squandered a precious opportunity. Do you understand the lesson of this story?"