Answer:
The endowment effect
Step-by-step explanation:
According to the endowment effect, people are emotionally biased and tend to over value what they already own and undervalue what they haven't purchased.
They form some kind of attachment to what belongs to them and attach extra value to the item, due to the fear of losing it.
For example a person may prefer to continue using an old car rather than pay a certain amount to buy another used car.
Pentrall Bros, is trying to avoid the endowment effect by ensuring the prices of its used cars, are not higher than the prices at which customer's value them.