Urt salt

The Urt salt is a members-only Old School RuneScape item — “A green salt that, when burned with other salts provides various benefits.”. Its Grand Exchange buy limit is 10,000 per 4 hours. Right now it buys at 114 gp and sells at 148 gp — a net margin of 32 gp (28.1% ROI) after the 2% Grand Exchange tax of 2 gp. High alchemy yields 6 gp.

To flip it, place a buy offer near 114 gp and a sell offer near 148 gp; the spread minus GE tax is your profit. Confidence figures are model estimates from live OSRS Wiki prices, not guarantees — flip responsibly.