Irit tar

Irit Tar is a members-only item on the OSRS Grand Exchange in the other category.

In-game examine text: "A dark, thick, foul-smelling, tar-like substance."

It has a Grand Exchange buy limit of 11,000 every four hours, a high alchemy value of 1 gp, and item ID 28837.

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Irit Tar shows an active flip setup with a margin of +9 gp and 961,293 trades over the last 24 hours.

At the buy limit of 11,000 every four hours, max profit per cycle is about 99.0k gp — high margin with healthy liquidity.