My checklist of features is always complete with a ~200 USD offer:

• GPS with at least compatibility with three constellations/bands, included navstar
• needs to have FM radio or something similar that doesn’t depend on an internet connection
• 3.5 jack
• SD card slot or 256 GB or more local storage
• huge battery life, so I can keep it at 80% maximum to save battery cycles for the long run
• oled screen, of +60Hz, better
• decent camera or set of cameras
• unlockable bootloader
• good odds to make it to official status in Lineage OS