How to flip Dragon warhammer in OSRS

Flipping Dragon warhammer on the Old School RuneScape Grand Exchange currently makes about -105,767 gp profit per item after the 2% GE tax: buy near 13,715,771 gp (the instant-sell price) and re-list near 13,887,759 gp (the instant-buy price).

• Buy at (instant-sell): 13,715,771 gp
• Sell at (instant-buy): 13,887,759 gp
• Margin after 2% tax: -105,767 gp (-0.77% ROI)
• Buy limit per 4 hours: 8
• 24h volume: 1,979 (liquid)
• Max profit per limit cycle: -846,136 gp on 109,726,168 gp of capital

The flip, step by step

1. Place a buy offer at or just above 13,715,771 gp (the current instant-sell price).
2. Wait for the fill. Dragon warhammer is liquid right now, so expect fills within the hour at reasonable prices.
3. Re-list at or just below 13,887,759 gp (the current instant-buy price).
4. The GE takes 277,755 gp tax (2%) per item when it sells, leaving -105,767 gp profit each.
5. Repeat up to the buy limit (8 per 4 hours), a full cycle is -846,136 gp on 109,726,168 gp of capital.

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