Cosmic rune
F2PBuy limit: 18,000·last trade 1m ago
Confidence
Confidence80%
One score blending fill chance, market volume and profit quality.
Fill chance92%
Volume100%
Profit64%
Suggested prices
ConservativeSafe fillsBigger margins
Buy at121
Buy fills37%
Sell at124
Sell fills38%
Net / item1 (0.8%)
Est. profit / 4h18.0K
18,000 units · 92% fill confidence
Insta-sell
121
cheapest buy (full spread)
Insta-buy
124
dearest sell (full spread)
Gross margin
3
GE tax
2
2% per item, max 5M
Net margin
1
0.8% ROI
Volatility
5.3%
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 121 gp and sells at 124 gp — a net margin of 1 gp (0.8% ROI) after the 2% Grand Exchange tax of 2 gp. High alchemy yields 30 gp.
To flip it, place a buy offer near 121 gp and a sell offer near 124 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 liquidity56%
Recent activity99%
Size vs market97%
Why this profit score
Spread persistence67%
No price spike97%
Margin plausibility100%