William K. Hennigar is a notable figure in the realm of independent cinema, primarily celebrated for his distinctive directorial style that captures the essence of 1960s counterculture. His most acclaimed work, "Mr. Mari's Girls" (1967), stands out as a quintessential example of the era's avant-garde filmmaking. This film has garnered a cult following among collectors, not only for its innovative narrative techniques but also for its striking visuals and compelling portrayal of youth rebellion. Collectors actively seek out Hennigar's films, particularly "Mr. Mari's Girls," due to its limited home media releases and the cultural significance it holds within the history of American independent film. Items like the original VHS and early DVD editions are prized possessions, often fetching high prices at auctions. Hennigar’s contribution to the film landscape, coupled with the film's rarity, solidifies his status as a must-have for any serious physical media enthusiast.