Don't sweat it until time to order, If they pull this BS, tell them you want to talk to the dealership owner, and that you are going to tweet Duncan Aldred, and Mary Barra, and stir up lots of trouble if they gouge you 1 penny... That should make them think twice...
If that does not work, tell them you want to be in a good mood when you fill out the dealership satisfaction survey, and if you get gouged, you will return the favor on that satisfaction survey.