"Flagship power and a great camera for under $300, if you accept the battery gamble."
The A15 Bionic chip means this several-generations-old phone will still run apps and games more smoothly than most brand-new devices sold at the same price.
This is a strong option for buyers on a strict budget who prioritize camera quality, processing speed, and access to the iOS ecosystem. It provides the core experience of a much more expensive phone for a fraction of the cost, assuming the buyer accepts the trade-offs of a used device.
Anyone for whom battery life is non-negotiable should pass. A heavy user will likely need to charge this phone mid-day. Buyers who want the peace of mind of a new warranty or a cosmetically perfect device should also look elsewhere.