Security book
F2PBuy limit: 15·last trade 17m ago
Confidence
Confidence28%
One score blending fill chance, market volume and profit quality.
Fill chance43%
Volume11%
Profit27%
Suggested prices
ConservativeSafe fillsBigger margins
Buy at84
Buy fills2%
Sell at87
Sell fills2%
Net / item2 (2.4%)
Est. profit / 4h30
15 units · 43% fill confidence
Insta-sell
84
cheapest buy (full spread)
Insta-buy
87
dearest sell (full spread)
Gross margin
3
GE tax
1
2% per item, max 5M
Net margin
2
2.4% ROI
Volatility
51.6%
price noise (1h history)
How to flip the Security book
The Security book is a free-to-play Old School RuneScape item — “WARNING: Contains information which could make your account secure!”. Its Grand Exchange buy limit is 15 per 4 hours. Right now it buys at 84 gp and sells at 87 gp — a net margin of 2 gp (2.4% ROI) after the 2% Grand Exchange tax of 1 gp. High alchemy yields 1 gp.
To flip it, place a buy offer near 84 gp and a sell offer near 87 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 volume12%
Two-sided liquidity100%
Recent activity87%
Size vs market25%
Why this profit score
Spread persistence0%
No price spike87%
Margin plausibility100%