you didn't hurt anyone by selling your watch here. UPon closer inspection it does seem you have a not so common watch there and your indignation seems to suggest you were in fact misunderstood.
What you should keep in mind is that most adults have a problem with being told something that doesn't make sense. It "insults our intelligence" if you will.
Most people will think you are trying to take them for a ride when you say you have a product you intend to sell (at some point) to a forum populated with the target buyers and at the same time say you had no idea it might have turned into a sale.
That escapes logic. All I'm saying is that you shouldn't be upset with those who do use their logic when you have failed to unwittingly use your own logic skills. I'm sure you are an honest guy but you should know that some people get very irritated when they hear politicians say things like: "what do you mean by "is"?"
You are probably to young at 19 to know what that means.