It is illegal to sell a motor vehicle on a Sunday.

The Law Explained

Maine is one of several states that still strictly enforces auto-dealership blue laws, which prohibit the sale of cars and RVs on Sundays. Originally rooted in religious traditions to observe a day of rest, the law is heavily supported today by dealership owners who want a guaranteed day off without losing business to competitors. You can look at the cars on the lot, but the sales office must remain firmly locked.