Black axe

Black Axe is a free-to-play item on the OSRS Grand Exchange in the weapons category.

In-game examine text: "A sinister looking axe."

It has a Grand Exchange buy limit of 40 every four hours, a high alchemy value of 230 gp, and item ID 1361.

View on OSRS Wiki

Black Axe shows an active flip setup with a margin of +1.5k gp and 1,765 trades over the last 24 hours.

At the buy limit of 40 every four hours, max profit per cycle is about 60.0k gp — high margin with healthy liquidity.