Not all 21.5-inch iMacs are created equal. Avoid these specific configurations at all costs:
Are you looking at a or model year right now? 2017 21.5” 4k iMac Updated Review | Still great! buy imac 21.5
Bring a thumb drive to ensure all the USB and Thunderbolt ports are firing and reading data normally. Not all 21
Ensure the previous owner has signed out of iCloud and disabled Find My Mac . If it is locked, the computer is useless to you. buy imac 21.5
Many used iMacs develop a slight pink or brown hue around the very edges of the screen as the glass and adhesive age. Look at a blank white screen to test this. 💡 The Smarter Alternative