Extended super antifire mix(2)

The Extended super antifire mix(2) is a members-only Old School RuneScape item — “Two doses of fishy extended super anti-firebreath potion.”. Its Grand Exchange buy limit is 2,000 per 4 hours. Right now it buys at 11,238 gp and sells at 19,991 gp — a net margin of 8,354 gp (74.3% ROI) after the 2% Grand Exchange tax of 399 gp. High alchemy yields 144 gp.

To flip it, place a buy offer near 11,238 gp and a sell offer near 19,991 gp; the spread minus GE tax is your profit. Confidence figures are model estimates from live OSRS Wiki prices, not guarantees — flip responsibly.