UFC 151 - Pick KOTN - 500,000 credits.
Vote in the poll for which FIGHT you think will win the award. Pick correct and when 500,000 credits. Easy! If you think Bones knocks out Hendo, all you have to do is pick that fight. Even if Hendo KO's Jones you still win! (mainly due to not enough poll options to list every fighter individually, but hey ho )