Ancient coif

Ancient Coif is a members-only item on the OSRS Grand Exchange in the armour category.

In-game examine text: "Ancient blessed dragonhide coif."

It has a Grand Exchange buy limit of 8 every four hours, a high alchemy value of 1.2k gp, and item ID 12496.

View on OSRS Wiki

Ancient Coif shows an active flip setup with a margin of +5.3k gp and 618 trades over the last 24 hours.

At the buy limit of 8 every four hours, max profit per cycle is about 42.3k gp — high margin with healthy liquidity.