Sanfew serum(2)

Sanfew Serum(2) is a members-only item on the OSRS Grand Exchange in the potions category.

In-game examine text: "A 2 dose Sanfew Serum."

It has a Grand Exchange buy limit of 2,000 every four hours, a high alchemy value of 108 gp, and item ID 10929.

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Sanfew Serum(2) shows an active flip setup with a margin of +555 gp and 2,630 trades over the last 24 hours.

At the buy limit of 2,000 every four hours, max profit per cycle is about 1.11m gp — high margin with healthy liquidity.