How to flip Antidote++(4) in OSRS

Flipping Antidote++(4) on the Old School RuneScape Grand Exchange currently makes about 104 gp profit per item after the 2% GE tax: buy near 10,045 gp (the instant-sell price) and re-list near 10,356 gp (the instant-buy price).

• Buy at (instant-sell): 10,045 gp
• Sell at (instant-buy): 10,356 gp
• Margin after 2% tax: 104 gp (1.04% ROI)
• Buy limit per 4 hours: 4,000
• 24h volume: 105,760 (extremely liquid)
• Max profit per limit cycle: 416,000 gp on 40,180,000 gp of capital

The flip, step by step

1. Place a buy offer at or just above 10,045 gp (the current instant-sell price).
2. Wait for the fill. Antidote++(4) is extremely liquid right now, so offers at fair prices typically fill within minutes.
3. Re-list at or just below 10,356 gp (the current instant-buy price).
4. The GE takes 207 gp tax (2%) per item when it sells, leaving 104 gp profit each.
5. Repeat up to the buy limit (4,000 per 4 hours), a full cycle is 416,000 gp on 40,180,000 gp of capital.

Margins move constantly. Re-check the live Antidote++(4) numbers and price chart on GrandExchange.com right before committing.