That whole industry is a mystery to me. We have a friend who was Business manager of a European dealership. She said that a competing dealer was losing money on every car they sold. That competing dealership also sold a domestic brand, and we took an ad for $7,000 off sticker from that dealership to another dealership that sold the same brand. They looked at the ad, said they would match it, but said the same thing, "that price is below both wholesale and dealer cost".
But as our friend put explained it, you never know what kickbacks the dealer is getting from the auto maker. They got like $30,000 in money for advertising if they sold 30 cars of a particular model in a month. The lost money on the original sale of each of those cars. She also said, even if they make a profit, it's not uncommon for them to make only $25 on a $50,000 new car sale, and $5,000 on a $10,000 used car sale. But service is where they make their money.