PTA-approved iPhones carry the highest value as they're locally registered. Bypass iPhones have the lowest value due to limited functionality.
10/10 = like new, no marks. 9/10 = very minor cosmetic. 8/10 = visible wear. 7/10 = clear wear, fully functional. Faults are assessed separately.
Battery health is read directly from iPhone Settings → Battery → Battery Health. Higher battery health and sealed (WaterPack) units fetch premium offers.