You may have more options in larger markets, but keep in mind, also, that car dealerships are fewer than they were in before the Great Recession. They're also more heavily consolidated. Most markets had at least two times more Ford, GM, and Chrysler dealerships than they needed (some had six times more of those dealerships than they could comfortably support), and the Great Recession eliminated most of the redundant dealerships. My last radio job was eliminated when two auto dealerships that were six figure spenders with the station shut down. They didn't sell or consolidate; they just sold their inventory, locked the doors, and walked away.
I live in a small city of just over 100,000. We had two or three Ford, GM and Chrysler dealerships each. That doesn't include the two Honda dealerships, or the couple Toyota dealers, or any of the other import motor dealers. Between roughly a dozen dealerships, we had about eight unique owners. We had at least one dealership in every break, and a couple of them dropped north of $50,000/year for sponsorships of events, our weather radar, and other non-spot buys. When the Great Recession hit, we went down to one dealership for each brand. Since then, a dealership out of Little Rock has bought the bulk of the dealers in town. The result is that we went from eight unique owners to three.
That's significant because, if I was interested in a Ford, advertising your specials might get me into your dealership versus the other one in town. The other no longer exists, and the remaining Ford dealership has less incentive to advertise its specials. I have to visit them or go out of town. Also, with Ford, Nissan, Honda, Kia, and Hyundai under the same ownership (as well as Chrysler and Mercedes-Benz under a different umbrella), they're no longer competing with each other like they were 20 years ago. The dealerships here don't advertise on any medium like they did 15-20 years ago. They still advertise and even still advertise on radio, but they do so a lot more sparingly. The people in Little Rock don't care much what you buy so long as you buy from them, and, if you're set on a specific vehicle, they've got you when you walk in the door. With talk that Nissan may go bankrupt in the next three years, we might not yet have seen the bottom.