Diabolic worms

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

In-game examine text: "Their subtle, pulsing glow would be great for catching anglerfish."

It has a Grand Exchange buy limit of 8,000 every four hours, a high alchemy value of 54 gp, and item ID 30773.

View on OSRS Wiki

Diabolic Worms shows an active flip setup with a margin of +382 gp and 382,009 trades over the last 24 hours.

At the buy limit of 8,000 every four hours, max profit per cycle is about 3.06m gp — high margin with healthy liquidity.