When I was at MD we had student tickets that couldn't be resold to the public. You needed to show your student ID to get in. Sure it was pretty easy to sneak people in using someone else's ID but I doubt anyone would risk a couple grand to possibly get turned away. This is assuming the same rules are in place at Duke.
NC has a shot. Duke isn't going to push them around, which bothers this team. In a finesse game, NC could play with them. I'm definitely taking a shot with the nine points. Should add I'm not a fan of either team, just a pure handicapping opinion.