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4 doses serum 207 as described in Herbi Flax's diary.
Serum 207 (4) has a wide margin right now: instant buys at 55 gp against instant sells at 50 gp, 10% apart. After the 2% Grand Exchange tax, the margin leaves 4 gp profit per item. 1 units changed hands in the last hour. GrandExchanger counts it in the Herbs & Potions sector. It is a members-only item. Game facts on the OSRS Wiki
1 buy · 0 sell · 0 neutral
Positive momentum: the short-term trend is pushing the price up.
Within normal trading range.
Below VWAP: trading below the average. A possible time to buy.
Momentum is neutral.
Moderate volatility: typical price movement.
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