I don't think North Dakota is in the market range where they could mark them up but in Cali or larger cities i could see it happening. I placed $500 down on my '99 Type R 6 months in advance (price was just over $25k) and when I when it was delivered they tried to stick $2500 on top of my purchase price but after a bunch of intense words I did get it out the door for sticker but $5000 seemed to be a common markup for cars that weren't pre ordered.
'12 Focus Red Candy SE Sport 5 spd
'99 Toyota 4Runner Sport
'11 Subaru WRX STI Hatch