Cadava berries

Cadava Berries is a free-to-play item on the OSRS Grand Exchange in the other category.

In-game examine text: "Poisonous berries."

It has a Grand Exchange buy limit of 600 every four hours, a high alchemy value of 1 gp, and item ID 753.

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Cadava Berries shows an active flip setup with a margin of +27 gp and 18,346 trades over the last 24 hours.

At the buy limit of 600 every four hours, max profit per cycle is about 16.2k gp — high margin with healthy liquidity.