Needful Things (1993)

Welcome to Castle Rock, Maine, a lovely place to live if you don't mind selling your soul! Sheriff Alan Pangborn has a devil of a problem: Suddenly all the residents of his sleepy little town are dying'to kill each other. But at least business is still booming, especially at a new antique store. The store's owner has something for everyone, and his prices are always reasonable: just one small favor oh, and, of course, eternal damnation!