trade in
/treɪd ɪn/
noun
- An item, such as a car or appliance, given as part of the payment for a new one, usually with a discount on the purchase price.
- We used our old car as a trade-in to lower the cost of the new one.
- He traded in his laptop for a newer model and got a trade-in credit.
- The store offered a good trade-in value for my used smartphone.