How to flip Halibut in OSRS

Flipping Halibut on the Old School RuneScape Grand Exchange currently makes about -9 gp profit per item after the 2% GE tax: buy near 1,846 gp (the instant-sell price) and re-list near 1,874 gp (the instant-buy price).

• Buy at (instant-sell): 1,846 gp
• Sell at (instant-buy): 1,874 gp
• Margin after 2% tax: -9 gp (-0.49% ROI)
• Buy limit per 4 hours: 10,000
• 24h volume: 236,157 (extremely liquid)
• Max profit per limit cycle: -90,000 gp on 18,460,000 gp of capital

The flip, step by step

1. Place a buy offer at or just above 1,846 gp (the current instant-sell price).
2. Wait for the fill. Halibut is extremely liquid right now, so offers at fair prices typically fill within minutes.
3. Re-list at or just below 1,874 gp (the current instant-buy price).
4. The GE takes 37 gp tax (2%) per item when it sells, leaving -9 gp profit each.
5. Repeat up to the buy limit (10,000 per 4 hours), a full cycle is -90,000 gp on 18,460,000 gp of capital.

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