Ben Selleck (JAMES BROLIN) operates a struggling car dealership that has been in his family for 40 years, but is now in danger of going out of business. With the approach of a three-day Fourth of July holiday weekend, he decides to hire a team of professional used-car salespeople to give his business a quick sales boost.
The team is led by Don Ready (JEREMY PIVEN), a slick, smooth-talking liquidator who doesn't mind skipping from town to town, living in motels, eating fast-food, drinking hard liquor, and getting his kicks at the local strip club. He is joined by Jibby Newsome (VING RHAMES), a salesman who is tired of one-night stands and craves love; Brent Gage (DAVID KOECHNER), a cocksure salesman who isn't above bending the rules to make a sale; and Babs Merrick (KATHRYN HAHN), the lone female on the team who lives and sells just as hard as the boys.
What they find at Ben's dealership is a motley crew of unmotivated employees and one very profane, elderly salesman named Dick (CHARLES NAPIER), who routinely attacks customers if they say something he disagrees with or finds personally insulting. Don, meanwhile, falls for the owner's daughter, Ivy (JORDANA SPIRO). But she is engaged to the son, Paxton (ED HELMS), of Stu Harding (ALAN THICKE), Ben's rival. When Ben sells the dealership to Stu, Don wagers that he and his team can stop the sale if they sell every vehicle on the Selleck lot.