Black tourmaline core
P2PBuy limit: 5·last trade 1h ago
Confidence
Confidence26%
One score blending fill chance, market volume and profit quality.
Fill chance18%
Volume7%
Profit63%
Suggested prices
ConservativeSafe fillsBigger margins
Buy at277,001
Buy fills1%
Sell at337,943
Sell fills0%
Net / item54,184 (19.6%)
Est. profit / 4h270.9K
5 units · 18% fill confidence
Insta-sell
277,000
cheapest buy (full spread)
Insta-buy
337,944
dearest sell (full spread)
Gross margin
60,944
GE tax
6,758
2% per item, max 5M
Net margin
54,186
19.6% ROI
Volatility
14.2%
price noise (1h history)
How to flip the Black tourmaline core
The Black tourmaline core is a members-only Old School RuneScape item — “The blackened heart of the Grotesque Guardians.”. Its Grand Exchange buy limit is 5 per 4 hours. Right now it buys at 277,000 gp and sells at 337,944 gp — a net margin of 54,186 gp (19.6% ROI) after the 2% Grand Exchange tax of 6,758 gp. High alchemy yields 24,900 gp.
To flip it, place a buy offer near 277,000 gp and a sell offer near 337,944 gp; the spread minus GE tax is your profit. Confidence figures are model estimates from live OSRS Wiki prices, not guarantees — flip responsibly.
Price history
● insta-buy● insta-sell● moving avg
Why this fill score
Trading volume8%
Two-sided liquidity0%
Recent activity53%
Size vs market17%
Why this profit score
Spread persistence40%
No price spike100%
Margin plausibility100%