Ultracompost

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

In-game examine text: "Ultra-good for the smallest or largest of plants."

It has a Grand Exchange buy limit of 2,000 every four hours, a high alchemy value of 51 gp, and item ID 21483.

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Ultracompost currently has a flip margin of +0 gp, which isn't profitable to flip right now despite 514,814 trades over the last 24 hours.

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