Blood pint

Blood Pint is a members-only item on the OSRS Grand Exchange in the runes category.

In-game examine text: "It's literally a pint of blood."

It has a Grand Exchange buy limit of 2,000 every four hours, a high alchemy value of 1 gp, and item ID 24774.

View on OSRS Wiki

Blood Pint shows an active flip setup with a margin of +3 gp and 42,086 trades over the last 24 hours.

At the buy limit of 2,000 every four hours, max profit per cycle is about 6.0k gp — high margin with healthy liquidity.