This might be only me, but I noticed that a lot of sellers place personal images (a standard CV-type photo) of people who are clearly stock models or just random beautiful individuals. I think that most do this kind of thing because they are trying to go for a poor man’s social engineering in the sense that they hope that others will be more inclined to take their offers.
However, I believe that this usually doesn’t work - doing a simple upload Google image search (with the uploaded image) will show where it came from, which is not a great impression for the potential buyer (“if you faked this, what else do you regularly fake as well” type of reasoning).
For me, it’s totally legit that some people do not want to reveal their own face (for whatever reason) and instead use some symbol, drawing or some other non-human photo, but using someone else’s face will most likely backfire.