With a legitimate service and year warranty, the price seems quite fair to me. Zooming in, I am seeing some spots on the dial, so the condition isn't excellent. But it can be easy to exaggerate small defects when looking at photos, and you experienced the watch in-person, so you have a better sense of how it appears on the wrist.
Did you happen to take any other photos, e.g. from other angles and/or the inside of the case-back? I don't suspect any particular issue, but with the information inside the case-back, one can double-check that things line up properly.