The deranged Dr. Caligari and his faithful sleepwalking Cesare are connected to a series of murders in a German mountain village, Holstenwall. This 1920 silent film is one of the most important films in horror. Moody and shocking, this chiller is the height of German Expressionist cinema and the prototype for whole genres in horror. Rob Zombie even modeled the music video for Living Dead Girl after this film. If you are a self respecting horror fan, you MUST own this film!
P.S. if you REALLY broke, This film has fallen into the public domain and can be freely downloaded from http://archive.org/details/DasKabinettdesDoktorCaligariTheCabinetofDrCaligari