A man and his wife receive a clue to an imminent assassination attempt, only to learn that their daughter has been kidnapped to keep them quiet. Though not really a horror film, I'm sure any horror fan will tell you how much they love this film. Staring the legend Peter Lorre and directed by Alfred Hitchcock (and if you don't know who that is, something is wrong with you mentally), this film is definitely a treasure to find in the Dollar Bin.
P.S. if you REALLY broke, This film has fallen into the public domain and can be freely downloaded from http://archive.org/details/AHTheManWhoKnewTooMuch1934