Superior dragon bones

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

In-game examine text: "There's something unnatural about these bones."

It has a Grand Exchange buy limit of 7,500 every four hours, a high alchemy value of 96 gp, and item ID 22124.

View on OSRS Wiki

Superior Dragon Bones shows an active flip setup with a margin of +97 gp and 298,881 trades over the last 24 hours.

At the buy limit of 7,500 every four hours, max profit per cycle is about 727.5k gp — high margin with healthy liquidity.