Black tourmaline core
P2PBuy limit: 5·last trade 27m ago
Confidence
Will it fill?28%
Will it profit?73%
Joint confidence20%
Suggested prices
ConservativeSafe fillsBigger margins
Buy at1,128,431
Buy fills7%
Sell at1,151,975
Sell fills0%
Net / item505 (0.0%)
Est. profit / 4h2.5K
5 units · round-trip fill 0%
Insta-sell
1,125,111
cheapest buy (full spread)
Insta-buy
1,155,295
dearest sell (full spread)
Gross margin
30,184
GE tax
23,105
2% per item, max 5M
Net margin
7,079
0.6% ROI
Volatility
7.6%
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 1,125,111 gp and sells at 1,155,295 gp — a net margin of 7,079 gp (0.6% ROI) after the 2% Grand Exchange tax of 23,105 gp. High alchemy yields 24,900 gp.
To flip it, place a buy offer near 1,125,111 gp and a sell offer near 1,155,295 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 volume19%
Two-sided liquidity0%
Recent activity80%
Size vs market17%
Why this profit score
Spread persistence40%
No price spike100%
Margin plausibility100%