Skin Game is a 1971 movie comedy starring James Garner and Louis Gossett, Jr.
Quincy Drew (Garner) and Jason O'Rourke (Gossett) travel from town to town in the south of the United States during the slavery era. Drew claims to be a down-on-his-luck slave owner who is selling O'Rourke as a slave. Drew gets the bidding rolling, sells O'Rourke, and the two later meet up to split the profit. O'Rourke was born a free man in New Jersey and is very well educated. The twist comes when O'Rourke is sold to a slave trader who is very savvy and intent on taking him down south to make a profit.
The film was remade three years later as a TV-movie called Sidekicks, with Larry Hagman playing Garner's role and Gossett reprising his part.