Which character can I cosplay as? And where can I get that cosplay as cheap as Possible?

I have two already,a secret character of my own creation,and L from Death Note, I need one of the following characters: Yuuki from Vampire Knight, Sebastian from Black Butler,Japan from Hetalia,Italy from Hetalia,Kagura from Fruits Basket,Haruhi from The Melancholy of Haruhi Suzumia,Haruhi from Ouran Highschool Host Club, Rei from Highschool of the dead,or Hatsune Miku of VOCALOID. Plus I need a place to buy it as cheap as possible!!!