Steam rune

The Steam rune is a members-only Old School RuneScape item — “A combined Water and Fire Rune.”. Its Grand Exchange buy limit is 18,000 per 4 hours. Right now it buys at 80 gp and sells at 89 gp — a net margin of 8 gp (10.0% ROI) after the 2% Grand Exchange tax of 1 gp. High alchemy yields 12 gp.

To flip it, place a buy offer near 80 gp and a sell offer near 89 gp; the spread minus GE tax is your profit. Confidence figures are model estimates from live OSRS Wiki prices, not guarantees — flip responsibly.