One Foot in Hell (1960)

Mitch Barrett becomes embittered because his wife is allowed to die when he can't pay for the medicine she needs. The remorseful townspeople hire Mitch to be a deputy sheriff, thereby enabling him to plot an elaborate bank robbery with the help of an artist, a pickpocket, a gunslinger and a bar-girl. In conjunction with the robbery, Mitch plans to avenge himself upon every man who hindered his purchase of a single bottle of medicine costing one dollar and eighty seven cents so many years ago.