The DJI dealer in my area whom I purchase from said this.
The condition looks like good per your pictures and descriptions. It may only need some adjustment. You may try updating the software, adjusting or re-assembling the gimbal and camera etc per your testing and judgement.
By the way, my comments are just an individule opnion. DJI did not authorize me to give you repair suggestions. If you need professional advice, you may contact DJI tech support.