Serum 207 (3)members
“3 doses serum 207 as described in Herbi Flax's diary.”
What to offer
room to competeThe two ranges overlap, so there is slack whichever side you push — but they are cut from the same 171 margin. Spend it all outbidding and there is none left for undercutting.
These are limits, not predictions. Serum 207 (3) last sold at 25 and last bought at 200 — offering exactly those joins a queue at a price that has already cleared. How long you wait depends on how many other offers are stacked at each price, and the Grand Exchange does not publish that to anyone outside Jagex.
About this item
Serum 207 is a potion that can be made after reading the diary of Herbi Flax during the Shades of Mort'ton quest, by adding ashes to a tarromin potion (unf), requiring level 15 Herblore and yielding 50 Herblore experience. It can be used to temporarily cure the otherwise incoherent, afflicted villagers of Mort'ton in exchange for a reward, as part of the Shades of Mort'ton minigame. It can also be used on the lit fire altar inside the Mort'ton temple, requiring 20% sanctity, to turn it into serum 208, which can be used to cure the afflicted in return for better rewards. As the possible rewards for curing the afflicted include all the items required to make the potion, and the only other potions that can be made with tarromin are strength potions, which give the same experience but require limpwurt root to make, making serum 207 can be used as an inexpensive, albeit slow, method of training Herblore.
From Serum 207 on the Old School RuneScape Wiki, used under CC BY-NC-SA 3.0.
- Buy limit
- 2,000 per 4h
- High alch
- 7
- Shop value
- 13
- Traded last hour
- 1,549
Its high alch value of 7 does not cover the 154 nature rune it would burn, so alching is a loss before the item itself is counted.
One unit, right now
- Buy at (instant-sell)traded 33m ago
- 25
- Sell at (instant-buy)traded 6h ago
- 200
- Spread
- 175
- Tax on the sale
- −4
- Margin per unit
- 171
Breakeven sell price is 26 — a spread of 4.00% just to clear the tax.
Your 1.00M
- Buy limit per 4 hours
- 2,000
- Units you can fund
- 2,000
- Capital required
- 50,000
- Profit per window
- 342,000
Price is stale, governed by the sell side at 6h. You can get in faster than you can get out.
Prices refreshed now.
Against its own history last 90 days · 73 daily bars
wider than 99% of the last 73 days
38% of the way up its 90-day range
Measured with medians rather than averages, because one spike — an update, a streamer, a brief squeeze — drags an average around for weeks afterwards and makes everything since look ordinary.