HummerMan is right on with this one. I spoke with a buddy at the dealership over a couple of beers, and got the truth out of him. With the floorplan and holdbacks, those are not shown in the invoice price that the dealer will show to you. Between those, national incentives and dealer cash for selling the vehicles, that's where the dealership makes a good chunk of it's cash. And suckers, too, of course.
Corvette= "The ability to pass with class"