How to flip Super combat potion(1) in OSRS

Flipping Super combat potion(1) on the Old School RuneScape Grand Exchange currently makes about -44 gp profit per item after the 2% GE tax: buy near 3,179 gp (the instant-sell price) and re-list near 3,198 gp (the instant-buy price).

• Buy at (instant-sell): 3,179 gp
• Sell at (instant-buy): 3,198 gp
• Margin after 2% tax: -44 gp (-1.38% ROI)
• Buy limit per 4 hours: 2,000
• 24h volume: 21,481 (very liquid)
• Max profit per limit cycle: -88,000 gp on 6,358,000 gp of capital

The flip, step by step

1. Place a buy offer at or just above 3,179 gp (the current instant-sell price).
2. Wait for the fill. Super combat potion(1) is very liquid right now, so offers usually fill within minutes to a quarter hour.
3. Re-list at or just below 3,198 gp (the current instant-buy price).
4. The GE takes 63 gp tax (2%) per item when it sells, leaving -44 gp profit each.
5. Repeat up to the buy limit (2,000 per 4 hours), a full cycle is -88,000 gp on 6,358,000 gp of capital.

Margins move constantly. Re-check the live Super combat potion(1) numbers and price chart on GrandExchange.com right before committing.