Combat potion(2)

The Combat potion(2) is a members-only Old School RuneScape item — “2 doses of combat potion.”. Its Grand Exchange buy limit is 2,000 per 4 hours. Right now it buys at 70 gp and sells at 130 gp — a net margin of 58 gp (82.9% ROI) after the 2% Grand Exchange tax of 2 gp. High alchemy yields 63 gp.

To flip it, place a buy offer near 70 gp and a sell offer near 130 gp; the spread minus GE tax is your profit. Confidence figures are model estimates from live OSRS Wiki prices, not guarantees — flip responsibly.