How to flip Antipoison(2) in OSRS

Flipping Antipoison(2) on the Old School RuneScape Grand Exchange currently makes about 14,604 gp profit per item after the 2% GE tax: buy near 308 gp (the instant-sell price) and re-list near 15,216 gp (the instant-buy price).

• Buy at (instant-sell): 308 gp
• Sell at (instant-buy): 15,216 gp
• Margin after 2% tax: 14,604 gp (4741.56% ROI)
• Buy limit per 4 hours: 2,000
• 24h volume: 1,456 (liquid)
• Max profit per limit cycle: 29,208,000 gp on 616,000 gp of capital

The flip, step by step

1. Place a buy offer at or just above 308 gp (the current instant-sell price).
2. Wait for the fill. Antipoison(2) is liquid right now, so expect fills within the hour at reasonable prices.
3. Re-list at or just below 15,216 gp (the current instant-buy price).
4. The GE takes 304 gp tax (2%) per item when it sells, leaving 14,604 gp profit each.
5. Repeat up to the buy limit (2,000 per 4 hours), a full cycle is 29,208,000 gp on 616,000 gp of capital.

Margins move constantly. Re-check the live Antipoison(2) numbers and price chart on GrandExchange.com right before committing.