For 27 inch refurbished monitors, the best purchase is usually the one that removes friction from the user's daily work. That might mean more screen space, better compatibility, easier installation or simply a dependable replacement for an existing device.
Use resolution, refresh needs, desk distance, connector type and stand adjustment as your technical filter. Then compare availability, warranty and whether the unit fits your current IT standards. This keeps the decision grounded in use, not just in headline specification.