Cosmic rune
F2PBuy limit: 18,000·last trade 1m ago
Confidence
Will it fill?96%
Will it profit?99%
Joint confidence95%
Suggested prices
ConservativeSafe fillsBigger margins
Buy at107
Buy fills39%
Sell at110
Sell fills38%
Net / item1 (0.9%)
Est. profit / 4h18.0K
18,000 units · round-trip fill 15%
Insta-sell
107
cheapest buy (full spread)
Insta-buy
110
dearest sell (full spread)
Gross margin
3
GE tax
2
2% per item, max 5M
Net margin
1
0.9% ROI
Volatility
7.7%
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 107 gp and sells at 110 gp — a net margin of 1 gp (0.9% ROI) after the 2% Grand Exchange tax of 2 gp. High alchemy yields 30 gp.
To flip it, place a buy offer near 107 gp and a sell offer near 110 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 liquidity77%
Recent activity99%
Size vs market98%
Why this profit score
Spread persistence100%
No price spike96%
Margin plausibility100%