Must have completed: Priest In Peril and The Restless Ghost
20 Crafting, 40 Smithing, 40 Mining
Ghostspeak amulet, Sapphire amulet (Strung), Spade, Ectotokens (only if you haven't completed the Ghosts Ahoy Quest yet).
3 Quest Points
1000 Prayer and Crafting XP,
750 coins, Enchanted key (allowing you to go on your own treasure digs until it disappears)
Access to the museum in the outpost