Heavy ballista

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

In-game examine text: "A powerful weapon forged from the wreckage of an airship."

It has a Grand Exchange buy limit of 8 every four hours, a high alchemy value of 570.0k gp, and item ID 19481.

View on OSRS Wiki

Heavy Ballista shows an active flip setup with a margin of +15.9k gp and 1,478 trades over the last 24 hours.

At the buy limit of 8 every four hours, max profit per cycle is about 126.9k gp — high margin with healthy liquidity.