Cosmic rune
F2PBuy limit: 18,000·last trade 2m ago
Confidence
Confidence77%
One score blending fill chance, market volume and profit quality.
Fill chance96%
Volume100%
Profit57%
Suggested prices
ConservativeSafe fillsBigger margins
Buy at109
Buy fills46%
Sell at117
Sell fills47%
Net / item6 (5.5%)
Est. profit / 4h108.0K
18,000 units · 96% fill confidence
Insta-sell
108
cheapest buy (full spread)
Insta-buy
118
dearest sell (full spread)
Gross margin
10
GE tax
2
2% per item, max 5M
Net margin
8
7.4% ROI
Volatility
5.7%
price noise (1h history)
How to flip the Cosmic rune
The Cosmic rune is a free-to-play Old School RuneScape item — “Used for enchant spells.”. Its Grand Exchange buy limit is 18,000 per 4 hours. Right now it buys at 108 gp and sells at 118 gp — a net margin of 8 gp (7.4% ROI) after the 2% Grand Exchange tax of 2 gp. High alchemy yields 30 gp.
To flip it, place a buy offer near 108 gp and a sell offer near 118 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 volume100%
Two-sided liquidity74%
Recent activity98%
Size vs market99%
Why this profit score
Spread persistence40%
No price spike81%
Margin plausibility100%