Briefcase

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

In-game examine text: "For your first day in the big city."

It has a Grand Exchange buy limit of 4 every four hours, a high alchemy value of 399 gp, and item ID 12335.

View on OSRS Wiki

Briefcase shows an active flip setup with a margin of +1.3k gp and 404 trades over the last 24 hours.

At the buy limit of 4 every four hours, max profit per cycle is about 5.4k gp — high margin with healthy liquidity.