The iPhone 17 Pro Max costs £1,195.00 new compared with £449.00 refurbished (no longer sold new) for the iPhone 15 Pro Max. Buying the iPhone 17 Pro Max refurbished instead of new saves £346.00. If you want a larger 6.9" screen, the iPhone 17 Pro Max is the better choice. If value is your priority, the iPhone 15 Pro Max offers the stronger buy at a lower price point.