Iron cannonball
P2PBuy limit: 11,000·last trade 5m ago
Confidence
Will it fill?73%
Will it profit?58%
Joint confidence43%
Suggested prices
ConservativeSafe fillsBigger margins
Buy at6
Buy fills40%
Sell at8
Sell fills47%
Net / item2 (33.3%)
Est. profit / 4h22.0K
11,000 units · round-trip fill 19%
Insta-sell
5
cheapest buy (full spread)
Insta-buy
9
dearest sell (full spread)
Gross margin
4
GE tax
0
2% per item, max 5M
Net margin
4
80.0% ROI
Volatility
24.1%
price noise (1h history)
How to flip the Iron cannonball
The Iron cannonball is a members-only Old School RuneScape item — “Ammo suited for a boat's cannon.”. Its Grand Exchange buy limit is 11,000 per 4 hours. Right now it buys at 5 gp and sells at 9 gp — a net margin of 4 gp (80.0% ROI) after the 2% Grand Exchange tax. High alchemy yields 2 gp.
To flip it, place a buy offer near 5 gp and a sell offer near 9 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 liquidity12%
Recent activity96%
Size vs market47%
Why this profit score
Spread persistence75%
No price spike59%
Margin plausibility29%