Catalytic tiara

The Catalytic tiara is a members-only Old School RuneScape item — “A tiara infused with the properties of every catalytic rune.”. Its Grand Exchange buy limit is 40 per 4 hours. Right now it buys at 142 gp and sells at 115 gp — a net margin of -29 gp (-20.4% ROI) after the 2% Grand Exchange tax of 2 gp. High alchemy yields 60 gp.

To flip it, place a buy offer near 142 gp and a sell offer near 115 gp; the spread minus GE tax is your profit. Confidence figures are model estimates from live OSRS Wiki prices, not guarantees — flip responsibly.