How to flip Rune mace in OSRS

Flipping Rune mace on the Old School RuneScape Grand Exchange currently makes about -319 gp profit per item after the 2% GE tax: buy near 8,300 gp (the instant-sell price) and re-list near 8,143 gp (the instant-buy price).

• Buy at (instant-sell): 8,300 gp
• Sell at (instant-buy): 8,143 gp
• Margin after 2% tax: -319 gp (-3.84% ROI)
• Buy limit per 4 hours: 70
• 24h volume: 42,978 (very liquid)
• Max profit per limit cycle: -22,330 gp on 581,000 gp of capital

The flip, step by step

1. Place a buy offer at or just above 8,300 gp (the current instant-sell price).
2. Wait for the fill. Rune mace is very liquid right now, so offers usually fill within minutes to a quarter hour.
3. Re-list at or just below 8,143 gp (the current instant-buy price).
4. The GE takes 162 gp tax (2%) per item when it sells, leaving -319 gp profit each.
5. Repeat up to the buy limit (70 per 4 hours), a full cycle is -22,330 gp on 581,000 gp of capital.

Margins move constantly. Re-check the live Rune mace numbers and price chart on GrandExchange.com right before committing.