They aren't going to fuck with just anyone. Reason being is that they actually have something to lose so they aren't going to throw it away dealing with some random drug dealer. If you aren't already in the circle, you ain't getting in that circle just by messaging someone on LinkedIn.
I wouldn't do it. You're risking too much for no garanteed sales. Just as the subdread owner wrote, those people aren't going to take risks dealing with a stranger. I recommend dealing to people you know to some extent and having a reliable circle of customers. You want people you know are there to buy.