Hello everyone, I need your help. I just sold a watch on WUS. It is my first sale ever. The buyer just received it today and pointed out that there is a blemish on the dial that I didn't mention in my description of the watch. It is visible in a picture on the listing--the main picture of the watch face-on--but I didn't notice it myself beforehand, didn't mention it in the text of the listing, and the buyer didn't notice it before buying the watch, either. What should I do in this situation? Like I said, this is my first sale on WUS...and I want to do right by this buyer. What are your thoughts?