What're Your Top Five Under-rated Short Stories of All Time?

While Ann and I work on this insanely huge book of weird fiction, covering a century, I thought it might be fun to ask a targeted question:What are the top five short stories you love but that you don't think get nearly enough respect? Why should they be reconsidered?It doesn't have to be fantastical fiction--anything you like. If you can only think of two or three, that's just fine.