Sanfew serum(1)

Sanfew Serum(1) is a members-only item on the OSRS Grand Exchange in the potions category.

In-game examine text: "A 1 dose Sanfew Serum."

It has a Grand Exchange buy limit of 2,000 every four hours, a high alchemy value of 72 gp, and item ID 10931.

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Sanfew Serum(1) shows an active flip setup with a margin of +100 gp and 3,715 trades over the last 24 hours.

At the buy limit of 2,000 every four hours, max profit per cycle is about 200.0k gp — high margin with healthy liquidity.