It is unusual for a vehicle to be in demo service for that long a period. Generally it is less than a year and less than 5,000 miles. I am curious why they kept it so long. Perhaps it was used by the Dealer Principal's spouse.
I'd want to know why it was in demo service for that long and exactly who was driving it.
"Dealer Executive Vehicle" is fancy talk for a demonstrator.....
There are also factory demos, sometimes called "Brass Hats". Those are driven by manufacturer employees and are sometimes vehicles that have had a small amount of repaired damage, making it impossible for them to be sold as new.