Strange selling practice, what do you think?

[sandybax]

Posted a WTB note on this site several days ago and today got a reply from someone on this forum offering me a 16753 GMT in mint condition. The pictures were a bit artificial (definitely not self-made and reminiscent of something) and the model was not with the dial I am after anyway. After I answered that this is not what I am looking for, I was instantly offered the exact model with the same strange pictures that definitely reminded me of some other watch site. Spent 2 minutes and, bingo, it turned out that the person is offering me watches from another watch selling site with a nice surcharge of $1000 (in the latest example). Well, I understand that people do business in various ways, and hypothetically this is a typical mediation, but the person claims to "have the watch for sale". Hence/ I would like to ask fellow forum members: do you guys think this is ok, or do you think that this is an improper practice?