Cowhide

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

In-game examine text: "I should take this to the tannery."

It has a Grand Exchange buy limit of 13,000 every four hours, a high alchemy value of 1 gp, and item ID 1739.

View on OSRS Wiki

Cowhide shows an active flip setup with a margin of +3 gp and 46,601 trades over the last 24 hours.

At the buy limit of 13,000 every four hours, max profit per cycle is about 39.0k gp — high margin with healthy liquidity.