If you do NCM Museum Delivery, you pay both because of a Federal law, passed in the late 1970's, enacted at the lobbying of car dealers association. Reason they pushed for it, is that they did not want other dealers, located closer to car manufacturing plants, to have a competitive advantage due to lesser delivery charges by some dealers being closer to the plant. It is now the same transporter or rail car delivery fee nationwide. So, since the cars go on transporters 1/3 of a mile to the National Corvette Museum, you pay as much as dealers located in the state of Washington for the transporter delivery fee. The NCM Museum Delivery fee is for a special experience. Please see these four threads as to why many, including me, will happily pay extra for the NCM delivery experience.
http://www.stingrayforums.com/forum/stingray-owners-logbook/1273-redhot-mine.html
http://www.stingrayforums.com/forum/stingray-corvette-discussions/1487-nat-l-corvette-museum.html
Webcam Corvette Blvd
National Corvette Museum - Museum Delivery
http://www.stingrayforums.com/forum/stingray-owners-logbook/1273-redhot-mine.html
http://www.stingrayforums.com/forum/stingray-corvette-discussions/1487-nat-l-corvette-museum.html
Webcam Corvette Blvd
National Corvette Museum - Museum Delivery