Small Time (2014)

Al Klein and his longtime friend, Ash Martini, own a used car lot and these two know every trick in the book when it comes to selling cars. Klein still pines for his ex-wife Barbara who left him years ago for a more successful man. After their son Freddy graduates from high school, he decides to forego college in favor of selling cars with his old man. But what’s good for Klein might not be the best thing for Freddy, as he quickly transforms from an innocent young man into a jaded car salesman, leaving Al with a tough decision to make.

Source: TMDb