Smoke battlestaff

The Smoke battlestaff is a members-only Old School RuneScape item — “It gives a 10% accuracy and damage bonus for spells on the standard spellbook.”. Its Grand Exchange buy limit is 8 per 4 hours. Right now it buys at 940,000 gp and sells at 1,134,280 gp — a net margin of 171,595 gp (18.3% ROI) after the 2% Grand Exchange tax of 22,685 gp. High alchemy yields 9,300 gp.

To flip it, place a buy offer near 940,000 gp and a sell offer near 1,134,280 gp; the spread minus GE tax is your profit. Confidence figures are model estimates from live OSRS Wiki prices, not guarantees — flip responsibly.