Gielinor's Ledger
Serum 207 (4)

Serum 207 (4)

4 doses serum 207 as described in Herbi Flax's diary.

MembersBuy limit 2,000Potions & DrinksQuest: [[Shades of Mort'ton]]
Insta-buy

43gp

Insta-sell

40gp

Spread

3gp

7.50%
Margin

+3gp

+7.50% ROI
Volume

—

Trend

—

Price history

1 points · hover for detail

Insta-buy (high)Insta-sell (low)Spread
30D low
40
30D high
43
Volatility
7.2%

Flip calculator

Includes the 2% Grand Exchange tax

gp
gp
units
Net profitProfitable

+3gp

+3 per item · +7.50% ROI

Capital required
40 gp
Gross revenue
43 gp
GE tax (2%, 0/item)
− 0 gp
Break-even sell
40 gp

Item data

High alchemy
8 gp81.4% below market
Low alchemy
5 gp
Shop value
14 gp
Weight
0.035 kg
Skill / type
Herblore
Stack / note
Not stackable · noteable
Released
Oct 18, 2004

About Serum 207 (4)

The Serum 207 (4) is a members-only potion in Old School RuneScape.

"4 doses serum 207 as described in Herbi Flax's diary"

Over the last 30 days it traded between 33 and 59 gp on the Grand Exchange, averaging 46 gp. About 3,222 units changed hands per day. The price is up 42.4% across that window. The Grand Exchange buy limit is 2,000 every 4 hours.

Casting High Level Alchemy returns 8 gp, which is 82.6% below the 30-day average price, so alching a bought one loses money.

Recipes

Where this item appears in crafting and processing.

Used to make

Serum 207 (4) price history

Daily averages rolled up per month, newest first.

Monthly average, low and high price of Serum 207 (4) on the Grand Exchange
MonthAverageLowHighVolume
October 202612d51455963,301
September 202645316444,826
August 2026373052124,474
July 202640195695,832
June 202621d26213523,072
May 20262d2926324,989
April 20261d292929167
March 202638254527,387
February 202637226216,607
January 202628185917,856

Across 10 months of recorded prices Serum 207 (4) ranged from 18 gp in January 2026 to 64 gp in September 2026, measured over 218 trading days.

The 30-day average of 46 gp sits around the middle of that range.

All prices in gp. Volume counts units traded across both sides of the Grand Exchange.

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