Vial of blood

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

In-game examine text: "A glass vial containing blood."

It has a Grand Exchange buy limit of 13,000 every four hours, a high alchemy value of 60 gp, and item ID 22446.

View on OSRS Wiki

Vial Of Blood shows an active flip setup with a margin of +36 gp and 295,954 trades over the last 24 hours.

At the buy limit of 13,000 every four hours, max profit per cycle is about 468.0k gp — high margin with healthy liquidity.