How to flip Rune knife in OSRS

Flipping Rune knife on the Old School RuneScape Grand Exchange currently makes about 12 gp profit per item after the 2% GE tax: buy near 93 gp (the instant-sell price) and re-list near 107 gp (the instant-buy price).

• Buy at (instant-sell): 93 gp
• Sell at (instant-buy): 107 gp
• Margin after 2% tax: 12 gp (12.90% ROI)
• Buy limit per 4 hours: 11,000
• 24h volume: 778,688 (extremely liquid)
• Max profit per limit cycle: 132,000 gp on 1,023,000 gp of capital

The flip, step by step

1. Place a buy offer at or just above 93 gp (the current instant-sell price).
2. Wait for the fill. Rune knife is extremely liquid right now, so offers at fair prices typically fill within minutes.
3. Re-list at or just below 107 gp (the current instant-buy price).
4. The GE takes 2 gp tax (2%) per item when it sells, leaving 12 gp profit each.
5. Repeat up to the buy limit (11,000 per 4 hours), a full cycle is 132,000 gp on 1,023,000 gp of capital.

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