There are many, many types of signage that we can provide for auto dealerships from the large building banners showing the "4 for the price of 3 tire" sales to the feather flags out front advertising a year end sale to the little sticky letters you put on loaner cars and pricing for used cars . You know what we're talking about. The $3995 pricing that is in the front windows and the "courtesy loaner car from ABC Toyota" to help folks see how awesome you are that you do such a thing to begin with.
Of course there are the logo pole banners in the parking lot you ought to change out regularly so everyone doesn't start tuning them out when they are the same for years on end. Freshen them up at least!