Hydra bones

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

In-game examine text: "The bones of a hydra."

It has a Grand Exchange buy limit of 7,500 every four hours, a high alchemy value of 96 gp, and item ID 22786.

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Hydra Bones currently has a flip margin of −91 gp, which isn't profitable to flip right now despite 120,875 trades over the last 24 hours.

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