Goblin mail

Goblin Mail is a free-to-play item on the OSRS Grand Exchange in the other category.

In-game examine text: "Some brown armour designed to fit goblins."

It has a Grand Exchange buy limit of 15 every four hours, a high alchemy value of 24 gp, and item ID 288.

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Goblin Mail currently has a flip margin of −3 gp, which isn't profitable to flip right now despite 2,887 trades over the last 24 hours.

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