Blue moon spear

Blue Moon Spear is a members-only item on the OSRS Grand Exchange in the weapons category.

In-game examine text: "A magical staff of ancient origin..."

It has a Grand Exchange buy limit of 15 every four hours, a high alchemy value of 60.0k gp, and item ID 28988.

View on OSRS Wiki

Blue Moon Spear shows an active flip setup with a margin of +55.2k gp and 1,182 trades over the last 24 hours.

At the buy limit of 15 every four hours, max profit per cycle is about 827.8k gp — high margin with healthy liquidity.