I sold Fords for a few months long ago. It's all about "floor plan".
The dealership gets cars based on how many they sell. After a certain amount of time, they start paying the car company for any unsold ones still on the lot. The price goes up, the longer the car is there. That's what's called the "floor plan". They'll start paying at 30 days, then the "rent" goes up at 60 days, then up again at 90 days as an example. So the incentive to move cars, even at a loss sometimes, is VERY high.
Sometimes you'll see an ad in the paper that's a super deal. The ad will say it applies to "stock number 12345" or otherwise to a particular car. Usually the dealership is dumping that car before they have to start paying on it (or are paying on it now). Big dealerships move a tremendous amount of cars, I mean a bunch each day, a dozen on the weekend depending on what's going on, time of year, etc. We had hundreds of cars on the lot, and only had one last longer than 30 days. That thing got cut to the bone and was gone in a hurry once they had to pay on it.
There won't be any left over, really. Selling at a small loss, if you get a trade-in for basically free, is fine too. The used car lot on the dealership is where all the money is. That's the cash cow.
Ross