pocket listing
n.— «He also dismissed reports on the TMZ.com Web site that Candy Spelling let go her staff of 30 to enable real estate agents to tour the house in what is known as a “pocket listing,” a quiet shopping around of a property.» —“Spelling Mansion May Be Put on Market” by Martha Groves, Annette Haddad Los Angeles Times July 6, 2006. (source: Double-Tongued Dictionary)