How to flip Mithril warhammer in OSRS

Flipping Mithril warhammer on the Old School RuneScape Grand Exchange currently makes about -238 gp profit per item after the 2% GE tax: buy near 1,039 gp (the instant-sell price) and re-list near 817 gp (the instant-buy price).

• Buy at (instant-sell): 1,039 gp
• Sell at (instant-buy): 817 gp
• Margin after 2% tax: -238 gp (-22.91% ROI)
• Buy limit per 4 hours: 125
• 24h volume: 5,653 (liquid)
• Max profit per limit cycle: -29,750 gp on 129,875 gp of capital

The flip, step by step

1. Place a buy offer at or just above 1,039 gp (the current instant-sell price).
2. Wait for the fill. Mithril warhammer is liquid right now, so expect fills within the hour at reasonable prices.
3. Re-list at or just below 817 gp (the current instant-buy price).
4. The GE takes 16 gp tax (2%) per item when it sells, leaving -238 gp profit each.
5. Repeat up to the buy limit (125 per 4 hours), a full cycle is -29,750 gp on 129,875 gp of capital.

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