How to flip Crystal tool seed in OSRS

Flipping Crystal tool seed on the Old School RuneScape Grand Exchange currently makes about 660,000 gp profit per item after the 2% GE tax: buy near 16,000,000 gp (the instant-sell price) and re-list near 17,000,000 gp (the instant-buy price).

• Buy at (instant-sell): 16,000,000 gp
• Sell at (instant-buy): 17,000,000 gp
• Margin after 2% tax: 660,000 gp (4.13% ROI)
• Buy limit per 4 hours: 100
• 24h volume: 215 (moderately traded)
• Max profit per limit cycle: 66,000,000 gp on 1,600,000,000 gp of capital

The flip, step by step

1. Place a buy offer at or just above 16,000,000 gp (the current instant-sell price).
2. Wait for the fill. Crystal tool seed is moderately traded right now, so fills can take an hour or more, patience pays here.
3. Re-list at or just below 17,000,000 gp (the current instant-buy price).
4. The GE takes 340,000 gp tax (2%) per item when it sells, leaving 660,000 gp profit each.
5. Repeat up to the buy limit (100 per 4 hours), a full cycle is 66,000,000 gp on 1,600,000,000 gp of capital.

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