How to flip Marlin scales in OSRS

Flipping Marlin scales on the Old School RuneScape Grand Exchange currently makes about 41 gp profit per item after the 2% GE tax: buy near 1,051 gp (the instant-sell price) and re-list near 1,114 gp (the instant-buy price).

• Buy at (instant-sell): 1,051 gp
• Sell at (instant-buy): 1,114 gp
• Margin after 2% tax: 41 gp (3.90% ROI)
• Buy limit per 4 hours: 11,000
• 24h volume: 498,919 (extremely liquid)
• Max profit per limit cycle: 451,000 gp on 11,561,000 gp of capital

The flip, step by step

1. Place a buy offer at or just above 1,051 gp (the current instant-sell price).
2. Wait for the fill. Marlin scales is extremely liquid right now, so offers at fair prices typically fill within minutes.
3. Re-list at or just below 1,114 gp (the current instant-buy price).
4. The GE takes 22 gp tax (2%) per item when it sells, leaving 41 gp profit each.
5. Repeat up to the buy limit (11,000 per 4 hours), a full cycle is 451,000 gp on 11,561,000 gp of capital.

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