Coconut

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

In-game examine text: "It's a coconut."

It has a Grand Exchange buy limit of 11,000 every four hours, a high alchemy value of 52 gp, and item ID 5974.

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Coconut currently has a flip margin of −18 gp, which isn't profitable to flip right now despite 805,759 trades over the last 24 hours.

Items with negative or zero margins like this are better watched than actively flipped until the spread widens.