Apple added the 2018 models, the iPhone Xs and Xs Max, to their program of repaired devices.
This basically means that you will be able to buy a unit, officially repaired by Apple, at a lower price than a new phone of these models.
A repaired iPhone Xs starts at $ 699 with 64 GB of storage and goes up to $ 999 for the 512 GB model.
The iPhone Xs Max will cost you $ 799 for the 64GB model, $ 929 for the 256GB variant, and $ 1,099 for the 512GB version.
These repaired models come with a new battery and wrappers, are packaged in a new box complete with all accessories, so you basically get a new phone, officially inspected and tested by Apple.
Save anywhere between $ 300 and $ 350, compared to the price of a new phone.