Weapon poison(+)

The Weapon poison(+) is a members-only Old School RuneScape item — “A vial of extra strong weapon poison, for spears and daggers.”. Its Grand Exchange buy limit is 2,000 per 4 hours. Right now it buys at 849 gp and sells at 1,018 gp — a net margin of 149 gp (17.6% ROI) after the 2% Grand Exchange tax of 20 gp. High alchemy yields 172 gp.

To flip it, place a buy offer near 849 gp and a sell offer near 1,018 gp; the spread minus GE tax is your profit. Confidence figures are model estimates from live OSRS Wiki prices, not guarantees — flip responsibly.