https://wccftech.com/apple-increase-iphone-trade-in-credit-100/

During its four-day Black Friday sale, Apple gave away gift cards with the purchases of eligible devices. Black Friday and Cyber Monday might be over, but Apple still has something for those who missed the previous deal. This comes in the form of its upgraded trade-in program, which was rebranded as GiveBack in April. Apple will now allow you to earn extra credit on top of the normal trade-in values when buying the newly launched iPhone XS or iPhone XR.

The offer applies to all phones from iPhone 6 to iPhone 8, but the owners of the iPhone 8 Plus, iPhone X, and iPhone SE cannot avail the offer. The extra credit worth up to $100 can be received either as an Apple Store gift card or a refund on purchases and you can exchange your old handsets via mail or at an Apple Store.