How to flip Adamant incendiary cannonball in OSRS

Flipping Adamant incendiary cannonball on the Old School RuneScape Grand Exchange currently makes about 501 gp profit per item after the 2% GE tax: buy near 500 gp (the instant-sell price) and re-list near 1,021 gp (the instant-buy price).

• Buy at (instant-sell): 500 gp
• Sell at (instant-buy): 1,021 gp
• Margin after 2% tax: 501 gp (100.20% ROI)
• 24h volume: 45,057 (very liquid)

The flip, step by step

1. Place a buy offer at or just above 500 gp (the current instant-sell price).
2. Wait for the fill. Adamant incendiary cannonball is very liquid right now, so offers usually fill within minutes to a quarter hour.
3. Re-list at or just below 1,021 gp (the current instant-buy price).
4. The GE takes 20 gp tax (2%) per item when it sells, leaving 501 gp profit each.
5. Repeat up to the buy limit.

Margins move constantly. Re-check the live Adamant incendiary cannonball numbers and price chart on GrandExchange.com right before committing.