Personally, I would be more inclined to purchase a used "H" that has gone through Yuneec's 27 point inspection as long as they include a copy of the completed test form. They test fly the H as well before signing off on it. At least you know it's working properly.
Here's what they check:
Ground Check:
- Firmware Updated to current version
- Motor Shafts and Propellers Good
- Battery slides in and makes good connection
- Landing gear in good condition
- camera installed and in good condition
- Frame inspected for structural damage
- Full transmitter system check
- Battery Cells Balance normal (if included)
- LED indicators check
Flight Check:
- Telemetry Data accurate and functioning
- Startup sequence normal
- GPS Signal locked and acquired sufficient satellites throughout flight (7-10 satellites)
- Stationary Hover Test Completed
- Tested Smart Mode Functionality (relies on GPS module)
- Tested Return To Home and Auto Landing Functions
- Motors and Battery tested for normal temperature
- Product Cleaned and prepped for shipping
- Included items inspected and packaged for return
Only test if involved in a crash or customer is having issues:
- Range Tested and within specs (H= 1000ft - 1300ft)
- Picture Tested at altitude
- camera tested for functionality and quality
- Video/Picture examined for discrepancies
Only test these features when customer is having issues or part is replaced:
Flight Check:
- Accelerometer test complete (part of main board functions)
- Compass Calibration Checked (only if aircraft doesn't fly in a straight heading)
- Tested Task Mode Functionality (relies on GPS module)
- Tested OBS Avoid/Real Sense Functions (if applicable)
Inspector: Date: Notes:
