I chose a window seat with extra leg room due to my disability, which cost me an additional $45 dollars. When boarding, there was a man in my seat with another in the aisle seat. I checked my seat number, and then politely told the man he was in my seat and asked for him to move. I turned my head to the man in my seat; and told him that I would make him a deal. He turned 14 shades of red, and moved to the middle seat.