Red hat

Red Hat is a members-only item on the OSRS Grand Exchange in the other category.

In-game examine text: "A silly pointed hat."

It has a Grand Exchange buy limit of 150 every four hours, a high alchemy value of 300 gp, and item ID 2910.

View on OSRS Wiki

Red Hat shows an active flip setup with a margin of +617 gp and 3,262 trades over the last 24 hours.

At the buy limit of 150 every four hours, max profit per cycle is about 92.5k gp — high margin with healthy liquidity.