William Macy deserved an Oscar for that movie.
As such, he undercoated each car as it came off the ship, and charged $500 to the dealers' base for the "added value", which the dealers just passed along to the customers, obviously.
At my first job out of school, I ended up working for a woman whose was looking at the hot car at the time, a Subaru. The first dealer she went to wanted $400 over list, just because of the scarcity. That dealer went on her black list.
Some years later, I read of some Mazda dealers doing a similar thing with the then-hot Miata.
Mazda USA corporate got involved, taking said dealer to task over what corporate was promoting versus what the dealers were doing.
I don't know, maybe it was a bad cop/good cop act.
That was a funny movie. Thinking it was all true made it a lot funnier.
It did irritate me to learn later that it was all made up. They simply lied about it being a true story.