Knife

Knife is a free-to-play item on the OSRS Grand Exchange in the other category.

In-game examine text: "A dangerous looking knife."

It has a Grand Exchange buy limit of 40 every four hours, a high alchemy value of 3 gp, and item ID 946.

View on OSRS Wiki

Knife shows an active flip setup with a margin of +2 gp and 2,664 trades over the last 24 hours.

At the buy limit of 40 every four hours, max profit per cycle is about 80 gp — high margin with healthy liquidity.