Brass necklace

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

In-game examine text: "I'd prefer a gold one."

It has a Grand Exchange buy limit of 150 every four hours, a high alchemy value of 18 gp, and item ID 1009.

View on OSRS Wiki

Brass Necklace shows an active flip setup with a margin of +50 gp and 2,743 trades over the last 24 hours.

At the buy limit of 150 every four hours, max profit per cycle is about 7.5k gp — high margin with healthy liquidity.