I bought a September 2015 product in March 2024; it was a Class C product, but as many of my senior buyers and I said, "Is this a C?" I was 'a bit surprised' considering it was over eight years old. There shouldn't be so many pieces that remain in good condition, but I imagine that this may have something to do with the rose gold colour.
The battery health was 84%, but there were scenes of rapid depletion (in just a few minutes, the battery drops from 100% fully charged to 93% to 87%), so I assume that the battery has been replaced with one of inferior quality to the genuine Apple battery. There is a 5000mAh light and good quality external battery from Anker, which I use in conjunction with the battery.
BackMarket's concept, "Do you need the latest model?" I have an SE2, but I use my 6s exclusively these days.