Grimy marrentill
If you bought your full buy limit on Grimy marrentill right now, you'd clear roughly 13.0K GP after the 2% GE tax. That's the ceiling. The actual margin shifts every few minutes, especially after Wednesday updates and weekend supply spikes.
It needs cleaning. Members-only on the GE. Buy limit 13,000 per 4 hours. A 2% Grand Exchange tax applies to sales, capped at 5,000,000 GP per item.
How Grimy marrentill trades on the Grand Exchange
Herbs feed the potion economy. Grimy from farming and drops, clean into potion-making. Volumes are typically high and spreads tight. A very high buy limit means one full cycle can move a lot of capital, so the margin per unit does not need to be large for the flip to be worth doing. Because it is members-only, it is only visible on the Grand Exchange for P2P accounts. Over the last hour its margin has held fairly steady.
Live flip margin
Don't miss the next move on Grimy marrentill
The margin can swing 30% within an hour after an OSRS update or a weekend supply shift. Set a price alert in GE IQ and you'll get pinged the second it crosses your target, no manual checking needed.
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