All in the Family S02E08 - The Blockbuster

The Bunkers are having problems with their furnace which gets Archie entertaining the idea of possibly moving to California. When an unscrupulous black real-estate salesman, Mr. Byrd, offers Archie a hefty sum of money for his home, Archie is all for it despite Mike's warnings that Byrd is a blockbuster (someone who persuades white home-owners to sell by appealing to the fear that minority groups will move into the neighborhood causing property values to decline).