How many times do we find cars like this ordered by GM office ? 

The average guy would not have ordered this car, the GM office would have used this as a show case and likely the top Manager would have used it as his car. I went to high school with a guy who worked at GM Zone Office on Leslie Street in Toronto, a car guy with COPO rights, the cars he drove were incredible. He loved ordering non recommended colour combo cars that always looked fantastic. He never held onto them very long because inevitable when out at a dealer someone would see one of his creations and want to buy it, which he had to permit.