Halloween can get more fun with an outrageous costume. But if opulence is what you want, you need the most expensive halloween costume of the year. And this year, you can get that by dressing up like the real Darth Vader. Christie’s London is all set to put up an original Darth Vader costume from the 1980 “Star Wars: The Empire Strikes Back” movie on sale. Owned by a “American private collector”, the set consists of helmet, mask, shoulder armour and shin guards. The costume is priced between $250,000 and $365,000.