How to flip Guam seed in OSRS

Flipping Guam seed on the Old School RuneScape Grand Exchange currently makes about 2 gp profit per item after the 2% GE tax: buy near 21 gp (the instant-sell price) and re-list near 23 gp (the instant-buy price).

• Buy at (instant-sell): 21 gp
• Sell at (instant-buy): 23 gp
• Margin after 2% tax: 2 gp (9.52% ROI)
• Buy limit per 4 hours: 600
• 24h volume: 22,401 (very liquid)
• Max profit per limit cycle: 1,200 gp on 12,600 gp of capital

The flip, step by step

1. Place a buy offer at or just above 21 gp (the current instant-sell price).
2. Wait for the fill. Guam seed is very liquid right now, so offers usually fill within minutes to a quarter hour.
3. Re-list at or just below 23 gp (the current instant-buy price).
4. The GE takes 0 gp tax (2%) per item when it sells, leaving 2 gp profit each.
5. Repeat up to the buy limit (600 per 4 hours), a full cycle is 1,200 gp on 12,600 gp of capital.

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