It seems appropriate to dedicate Sergio C. a similar poll which is dealing with his westerns. And I'm sure we will have quite surprising results.
Best SW: The Mercenary
Worst SW: The White, the Yellow, the Black (or Massacre at Grand Canyon which is in fact an Albert Band film)
Most overrated: The Hellbenders
Most underrated: The Specialists
So, what do you think about Corbucci's 13 SWs?