““For an example of how perception of a limited supply can increase sales, look no further than Amazon.com. My recent search for a DVD revealed there were “only 14 left in stock” (figure 18), while a search for a book I’ve had my eye on says only three copies remain. Is the world’s largest online retailer almost sold out of nearly everything I want to buy or are they using the scarcity heuristic to influence my buying behavior?””