How to flip Cactus seed in OSRS

Flipping Cactus seed on the Old School RuneScape Grand Exchange currently makes about 49 gp profit per item after the 2% GE tax: buy near 30 gp (the instant-sell price) and re-list near 80 gp (the instant-buy price).

• Buy at (instant-sell): 30 gp
• Sell at (instant-buy): 80 gp
• Margin after 2% tax: 49 gp (163.33% ROI)
• Buy limit per 4 hours: 200
• 24h volume: 15,350 (very liquid)
• Max profit per limit cycle: 9,800 gp on 6,000 gp of capital

The flip, step by step

1. Place a buy offer at or just above 30 gp (the current instant-sell price).
2. Wait for the fill. Cactus seed is very liquid right now, so offers usually fill within minutes to a quarter hour.
3. Re-list at or just below 80 gp (the current instant-buy price).
4. The GE takes 1 gp tax (2%) per item when it sells, leaving 49 gp profit each.
5. Repeat up to the buy limit (200 per 4 hours), a full cycle is 9,800 gp on 6,000 gp of capital.

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