Programs are similer to yearbooks with less content. Most programs contain photographs, biography and history of the home team and the visiting stars photos. Diagrams of the stadium, seating plan, schedule, ticket prices, rosters, line-ups, how to keep score and vintage advertisment are common features. Many fans purchase a program at the game to keepscore, for reading material or to secure autographs. Programs from when a record was broken command premium value. Condition and scarcity also effect value. Regular game programs from the 1970's up run under $25, but vintage, scarce and rare programs run in the thousand of dollars.