Dragonstone

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

In-game examine text: "This looks valuable."

It has a Grand Exchange buy limit of 11,000 every four hours, a high alchemy value of 6.0k gp, and item ID 1615.

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Dragonstone shows an active flip setup with a margin of +47 gp and 219,696 trades over the last 24 hours.

At the buy limit of 11,000 every four hours, max profit per cycle is about 517.0k gp — high margin with healthy liquidity.