Sanfew serum(4)

Sanfew Serum(4) is a members-only item on the OSRS Grand Exchange in the potions category.

In-game examine text: "A 4 dose Sanfew Serum."

It has a Grand Exchange buy limit of 2,000 every four hours, a high alchemy value of 180 gp, and item ID 10925.

View on OSRS Wiki

Sanfew Serum(4) currently has a flip margin of −240 gp, which isn't profitable to flip right now despite 151,365 trades over the last 24 hours.

Items with negative or zero margins like this are better watched than actively flipped until the spread widens.