Guam leaf

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

In-game examine text: "A bitter green herb."

It has a Grand Exchange buy limit of 13,000 every four hours, a high alchemy value of 1 gp, and item ID 249.

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Guam Leaf currently has a flip margin of −2 gp, which isn't profitable to flip right now despite 141,848 trades over the last 24 hours.

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