2012 H'we'en RuneScape event

If you haven't done it yet, I encourage you to do it... Every 2 hours RuneScape has the event over and over... each time you can get up to 50 ecto which will allow you to get - for 25 ecto each - a piece of outfit and for 50 ecto, the bonus piece... Imo, it's well worth it since you can use it after the event and get bonus xp for prayer when killing ghosts using the Ectoplasmator. Here's the most up to date information on it (it even gives locations):

http://runescape.wikia.com/wiki/2012_Hallowe%27en_event