@_elena The refurbished market is so big in America 🇺🇸 that both Apple & telecom companies participate in it (to a limited degree).
Ironically, my first iPhone ever was the original iPhone albeit refurbished because I could not afford to pay full price for the device (there were no deals back then to make it more affordable).
Apple recently purchased my old iPhone for $400 & are paying me for my old Apple Watch (they will sell both in the refurbished market).