: Use a tool like DriveDx to check the total data written (TBW). If the SSD is heavily worn, the entire machine is at risk since storage is soldered to the board on modern Macs.
: Go to Apple Menu > System Settings > General > About > System Report > Power . Under 300 cycles : Excellent condition. tips for buying a used macbook
Before handing over any money, perform these physical and functional checks: : Use a tool like DriveDx to check