Black tourmaline core
P2PBuy limit: 5·last trade 30m ago
Confidence
Confidence32%
One score blending fill chance, market volume and profit quality.
Fill chance26%
Volume13%
Profit54%
Suggested prices
ConservativeSafe fillsBigger margins
Buy at733,120
Buy fills4%
Sell at749,999
Sell fills0%
Net / item1,880 (0.3%)
Est. profit / 4h9.4K
5 units · 26% fill confidence
Insta-sell
733,119
cheapest buy (full spread)
Insta-buy
750,000
dearest sell (full spread)
Gross margin
16,881
GE tax
15,000
2% per item, max 5M
Net margin
1,881
0.3% 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 733,119 gp and sells at 750,000 gp — a net margin of 1,881 gp (0.3% ROI) after the 2% Grand Exchange tax of 15,000 gp. High alchemy yields 24,900 gp.
To flip it, place a buy offer near 733,119 gp and a sell offer near 750,000 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 volume15%
Two-sided liquidity0%
Recent activity78%
Size vs market17%
Why this profit score
Spread persistence40%
No price spike100%
Margin plausibility100%