The perceived value is the difference between the pain and the gain the buyer get.
When the Gain (benefits the customer gets from owning the product or using the service) is more than the Pain (too high price, too difficult to get, doesn’t solve the needs of the buyer, etc.), the customer is more willing to purchase the product or service. In case the Pain is more than the Gain, the customer is less interested in purchasing the product.
This is shown in the Value Proposition Canvas. On the right (round circle) is the perspective of the customer. On the left (square box) the product or service.