Rune crossbow

Rune Crossbow is a members-only item on the OSRS Grand Exchange in the weapons category.

In-game examine text: "A runite crossbow."

It has a Grand Exchange buy limit of 70 every four hours, a high alchemy value of 9.7k gp, and item ID 9185.

View on OSRS Wiki

Rune Crossbow shows an active flip setup with a margin of +64 gp and 10,401 trades over the last 24 hours.

At the buy limit of 70 every four hours, max profit per cycle is about 4.5k gp — high margin with healthy liquidity.