Halibut

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

In-game examine text: "Some nicely cooked halibut."

It has a Grand Exchange buy limit of 10,000 every four hours, a high alchemy value of 102 gp, and item ID 32336.

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Halibut currently has a flip margin of −16 gp, which isn't profitable to flip right now despite 319,979 trades over the last 24 hours.

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