An explicit purchase limit (e.g., "maximum 4 per person") acts as a powerful signal of scarcity and value. It suggests the deal is so good the store might sell out or lose money. An experiment showed that adding a purchase limit to a beer offer increased the perception of it being a good value by 57%.

People gravitate toward the middle option when given three choices, a bias known as extremeness aversion. To sell more of a specific product, frame it as the middle choice by introducing a more expensive, super-premium 'decoy' option. Its role is not to sell, but to make the target option look like a reasonable compromise.

Consumers determine a fair price relatively, not absolutely, by comparing a product to others in its category. By launching in a tall, thin 250ml can instead of a standard 330ml can, Red Bull prevented a direct price comparison with cheaper sodas like Coke. This change in the 'mental comparison set' allowed it to establish a new, premium price point.

Shoppers often approach indulgent categories with "healthy goggles," initially seeking better-for-you items. By leading with low-fat or healthy options at the front of an aisle, retailers can increase engagement and foot traffic. Once in the aisle, a significant number of these shoppers then "trade up" to the full-fat versions they originally planned to avoid.

Starbucks' limited-edition items, like a "bearista" cup selling for $500 on eBay, create massive hype through engineered scarcity. This strategy shows that for certain brands, limited-run physical goods can be a more potent marketing tool than the core product itself, fostering a collector's frenzy and a lucrative secondary market.

To sell more of a $300 package instead of a $200 one, introduce a $500 option. Most won't buy the decoy, but its presence shifts the customer's reference point, making the $300 package appear more reasonable and valuable by comparison.

Demonstrating the "paradox of choice," a large webshop increased sales of a cup by 7700% (77x) by reducing available color options from 25 to five. Too many choices overwhelm customers and create decision paralysis, leading them to abandon the purchase altogether.

By introducing a third, strategically priced but less appealing option (the "decoy"), you can manipulate how customers perceive value. A medium popcorn priced close to the large makes the large seem like a much better deal. This proves that value is relative and can be shaped by deliberate choice architecture.

Consumers determine value by comparing a product to similar items. Red Bull used a tall, thin, smaller can to differentiate itself from standard, cheaper sodas. By changing the "comparison set," they broke the expected price anchor and successfully commanded a much higher price point.