Barb-tail harpoon

The Barb-tail harpoon is a members-only Old School RuneScape item — “A mighty Hunter weapon. One previous owner.”. Its Grand Exchange buy limit is 40 per 4 hours. Right now it buys at 424 gp and sells at 422 gp — a net margin of -10 gp (-2.4% ROI) after the 2% Grand Exchange tax of 8 gp. High alchemy yields 21 gp.

To flip it, place a buy offer near 424 gp and a sell offer near 422 gp; the spread minus GE tax is your profit. Confidence figures are model estimates from live OSRS Wiki prices, not guarantees — flip responsibly.