I tried to sell tickets too close to gate 21 (like 500 ft I think) and they made me move. As for anywhere else, it is fair game. Do yourself a favor and dont buy from the guys that are wearing NFL jerseys and the like. Most of them are prof. scalpers and can eat the cost at times. If you see a bama fan selling tickets, give them a five spot for the ticket and take a 20 in change. They can't count anyhow.