Apple is finally doing something to turn its weak sales of iPhone XS, iPhone XS Max and iPhone XR. The company has announced a limited offer where you can get up to $ 100 more for your old iPhone as part of its trade-off program with GiveBack.
Obviously, Apple is not coming out and says that this is a promotional agreement to increase sales of the iPhone XS, iPhone XS Max and iPhone XR. He would never admit it. The evidence is quite clear though. For one, only the aforementioned iPhones can be purchased as part of the agreement.
For another, the older iPhone owners were apparently reluctant to give up their working phones for something so expensive. If Apple gives him more money, they might consider trading on their device. It is very convenient that the brand suddenly increases the value of their old units, especially because they could have done it a long time ago.
Apple has not declared when this promotional period will end, so if you're considering trading in your current iPhone, now is the time. Keep in mind that you will probably get more money if you sell it in the second-hand iPhone market. However, this involves a number of risks and the official way is cheaper.

New values for old iPhones

As part of the agreement, the iPhone 6 is worth $ 150 now compared to $ 75 before. The iPhone 6 Plus and the iPhone 6S went from $ 100 to $ 200. The iPhone 6S Plus and the iPhone 7 are both going for $ 250. The first was worth $ 150 and the last $ 175. Finally, you will receive $ 300 for iPhone 7 Plus and iPhone 8, more than the previous value of $ 250. The $ 500 rate of iPhone X remains the same.
For reference, the  iPhone XS starts at $ 999, the iPhone XS Max at $ 1099 and the iPhone XR  at $ 749. Apple has yet to say anything about increasing the value of its old iPhones in other markets such as the India. It probably should, since it makes no sense that an iPhone is worth more in one country and less in another.
You can start with the trade-in procedure for iPhone here.