Used Cars (1980)

Used car salesman Rudy Russo (Kurt Russell) needs money to run for State Senate, so he approaches his boss Luke (Jack Warden). Luke agrees to front him the $10,000 he needs, but then encounters an "accident" orchestrated by his brother Roy also played by Warden, who manages the car lot across the street. Roy is hoping to claim title to his brother's property because of his paying off the mayor to put the new interstate through the area. After Luke disappears, it's all out war between the competing car dealerships, and no nasty trick is off limits as Rudy and his gang fight to keep Roy from taking Luke's property. Then Luke's daughter shows up and assumes control of her father's property, but knows very little about advertising.