How to flip Grimy harralander in OSRS

Flipping Grimy harralander on the Old School RuneScape Grand Exchange currently makes about 22 gp profit per item after the 2% GE tax: buy near 184 gp (the instant-sell price) and re-list near 210 gp (the instant-buy price).

• Buy at (instant-sell): 184 gp
• Sell at (instant-buy): 210 gp
• Margin after 2% tax: 22 gp (11.96% ROI)
• Buy limit per 4 hours: 13,000
• 24h volume: 652,192 (extremely liquid)
• Max profit per limit cycle: 286,000 gp on 2,392,000 gp of capital

The flip, step by step

1. Place a buy offer at or just above 184 gp (the current instant-sell price).
2. Wait for the fill. Grimy harralander is extremely liquid right now, so offers at fair prices typically fill within minutes.
3. Re-list at or just below 210 gp (the current instant-buy price).
4. The GE takes 4 gp tax (2%) per item when it sells, leaving 22 gp profit each.
5. Repeat up to the buy limit (13,000 per 4 hours), a full cycle is 286,000 gp on 2,392,000 gp of capital.

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