Yak-hide

Yak-hide is a members-only item on the OSRS Grand Exchange in the other category.

In-game examine text: "Thakkrad, of Neitiznot, can cure this."

It has a Grand Exchange buy limit of 13,000 every four hours, a high alchemy value of 30 gp, and item ID 10818.

View on OSRS Wiki

Yak-hide shows an active flip setup with a margin of +254 gp and 6,903 trades over the last 24 hours.

At the buy limit of 13,000 every four hours, max profit per cycle is about 3.30m gp — high margin with healthy liquidity.