Engadget
The oldest iPhone model you can trade-in with Apple is older than you'd think

Apple trades iPhone 8 (2017) for $35 good / $10 damaged, iPhone 8 Plus for $40 good / $10 damaged, and iPhone X for $60 good / $0 damaged. iPads fetch up to $690, Macs up to $2,045, Apple Watch up to $305; HomePod, Apple TV, AirPods are recyclable only. Select Android phones receive limited credit, e.g., $255 for a 128 GB Pixel 9 Pro in good condition.