Barrel of demonic tallow (full)

The Barrel of demonic tallow (full) is a members-only Old School RuneScape item — “Somebody's been avoiding their cardio...”. Its Grand Exchange buy limit is effectively unlimited. Right now it buys at 17,800 gp and sells at 17,942 gp — a net margin of -216 gp (-1.2% ROI) after the 2% Grand Exchange tax of 358 gp. High alchemy yields 300 gp.

To flip it, place a buy offer near 17,800 gp and a sell offer near 17,942 gp; the spread minus GE tax is your profit. Confidence figures are model estimates from live OSRS Wiki prices, not guarantees — flip responsibly.