Answer:
Endowment effect
Step-by-step explanation:
Endowment effect also referred to as divestiture aversion occurs where individual places or ascribes much higher value than market value on product they already have. where endowment effect is at play the owner of an asset will refuse to sell the asset owned at a the market price higher than the initial cost. and even not ready to buy same item at the market price when offered.
This surprising behavioural pattern was discovered by a psychologist Richard Thaler in the 1970s