Tinderbox

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

In-game examine text: "Useful for lighting a fire."

It has a Grand Exchange buy limit of 40 every four hours, a high alchemy value of 1 gp, and item ID 590.

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Tinderbox currently has a flip margin of −1 gp, which isn't profitable to flip right now despite 5,658 trades over the last 24 hours.

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