How to flip Heavy ballista in OSRS

Flipping Heavy ballista on the Old School RuneScape Grand Exchange currently makes about 14,368 gp profit per item after the 2% GE tax: buy near 965,630 gp (the instant-sell price) and re-list near 999,997 gp (the instant-buy price).

• Buy at (instant-sell): 965,630 gp
• Sell at (instant-buy): 999,997 gp
• Margin after 2% tax: 14,368 gp (1.49% ROI)
• Buy limit per 4 hours: 8
• 24h volume: 881 (moderately traded)
• Max profit per limit cycle: 114,944 gp on 7,725,040 gp of capital

The flip, step by step

1. Place a buy offer at or just above 965,630 gp (the current instant-sell price).
2. Wait for the fill. Heavy ballista is moderately traded right now, so fills can take an hour or more, patience pays here.
3. Re-list at or just below 999,997 gp (the current instant-buy price).
4. The GE takes 19,999 gp tax (2%) per item when it sells, leaving 14,368 gp profit each.
5. Repeat up to the buy limit (8 per 4 hours), a full cycle is 114,944 gp on 7,725,040 gp of capital.

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