Rune mace

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

In-game examine text: "A spiky mace."

It has a Grand Exchange buy limit of 70 every four hours, a high alchemy value of 8.6k gp, and item ID 1432.

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Rune Mace shows an active flip setup with a margin of +131 gp and 28,845 trades over the last 24 hours.

At the buy limit of 70 every four hours, max profit per cycle is about 9.2k gp — high margin with healthy liquidity.