Brass key
F2PBuy limit: 15·last trade 2m ago
Confidence
Confidence55%
One score blending fill chance, market volume and profit quality.
Fill chance73%
Volume41%
Profit46%
Suggested prices
ConservativeSafe fillsBigger margins
Buy at430
Buy fills13%
Sell at818
Sell fills13%
Net / item372 (86.5%)
Est. profit / 4h5.6K
15 units · 73% fill confidence
Insta-sell
429
cheapest buy (full spread)
Insta-buy
819
dearest sell (full spread)
Gross margin
390
GE tax
16
2% per item, max 5M
Net margin
374
87.2% ROI
Volatility
25.9%
price noise (1h history)
How to flip the Brass key
The Brass key is a free-to-play Old School RuneScape item — “Opens a door that leads into a dungeon.”. Its Grand Exchange buy limit is 15 per 4 hours. Right now it buys at 429 gp and sells at 819 gp — a net margin of 374 gp (87.2% ROI) after the 2% Grand Exchange tax of 16 gp. High alchemy yields 1 gp.
To flip it, place a buy offer near 429 gp and a sell offer near 819 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 volume46%
Two-sided liquidity82%
Recent activity98%
Size vs market90%
Why this profit score
Spread persistence77%
No price spike79%
Margin plausibility18%