The man in the black shirt is showing the man in the orange shirt something that he has for sale.
Two men are next to each other.
One man is showing another man something he has, meaning the men have to be next to each other.
Because the first man is showing the second something he has for sale, the two men have to be in close proximity to one another.
For the man to be showing the other man something it's implied that they are next to each other.