Aldarium

The Aldarium is a members-only Old School RuneScape item — “A special alchemical ingredient used for creating potions.”. Its Grand Exchange buy limit is 13,000 per 4 hours. Right now it buys at 49,200 gp and sells at 49,571 gp — a net margin of -620 gp (-1.3% ROI) after the 2% Grand Exchange tax of 991 gp. High alchemy yields 60 gp.

To flip it, place a buy offer near 49,200 gp and a sell offer near 49,571 gp; the spread minus GE tax is your profit. Confidence figures are model estimates from live OSRS Wiki prices, not guarantees — flip responsibly.