Black tourmaline core
P2PBuy limit: 5·last trade 1h ago
Confidence
Confidence0%
One score blending fill chance, market volume and profit quality.
Fill chance24%
Volume21%
Profit0%
Suggested prices
ConservativeSafe fillsBigger margins
Buy at450,000
Buy fills32%
Sell at443,657
Sell fills0%
Net / item-15,216 (-3.4%)
Est. profit / 4h0
5 units · 24% fill confidence
Insta-sell
450,000
cheapest buy (full spread)
Insta-buy
443,657
dearest sell (full spread)
Gross margin
-6,343
GE tax
8,873
2% per item, max 5M
Net margin
-15,216
-3.4% ROI
Volatility
7.1%
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 450,000 gp and sells at 443,657 gp — a net margin of -15,216 gp (-3.4% ROI) after the 2% Grand Exchange tax of 8,873 gp. High alchemy yields 24,900 gp.
To flip it, place a buy offer near 450,000 gp and a sell offer near 443,657 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 volume24%
Two-sided liquidity0%
Recent activity50%
Size vs market17%
Why this profit score
Spread persistence0%
No price spike0%
Margin plausibility0%