How to flip Water sapphire in OSRS

Flipping Water sapphire on the Old School RuneScape Grand Exchange currently makes about 8,200 gp profit per item after the 2% GE tax: buy near 325,000 gp (the instant-sell price) and re-list near 340,000 gp (the instant-buy price).

• Buy at (instant-sell): 325,000 gp
• Sell at (instant-buy): 340,000 gp
• Margin after 2% tax: 8,200 gp (2.52% ROI)
• 24h volume: 927 (moderately traded)

The flip, step by step

1. Place a buy offer at or just above 325,000 gp (the current instant-sell price).
2. Wait for the fill. Water sapphire is moderately traded right now, so fills can take an hour or more, patience pays here.
3. Re-list at or just below 340,000 gp (the current instant-buy price).
4. The GE takes 6,800 gp tax (2%) per item when it sells, leaving 8,200 gp profit each.
5. Repeat up to the buy limit.

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