Star Wars character Darth Vader, are set to auctioned off next month.Prowse died aged 85 last year following a short illness, having made his name playing the masked villain in A New Hope, The Empire Strikes Back and Return Of The Jedi.In the wake of his passing, a host of his Star Wars-related possessions are going under the hammer in his hometown of Bristol. Suitably, the auction is set to take place on May 4.