How to flip Redwood bird house in OSRS

Flipping Redwood bird house on the Old School RuneScape Grand Exchange currently makes about -41 gp profit per item after the 2% GE tax: buy near 2,065 gp (the instant-sell price) and re-list near 2,065 gp (the instant-buy price).

• Buy at (instant-sell): 2,065 gp
• Sell at (instant-buy): 2,065 gp
• Margin after 2% tax: -41 gp (-1.99% ROI)
• Buy limit per 4 hours: 250
• 24h volume: 18,691 (very liquid)
• Max profit per limit cycle: -10,250 gp on 516,250 gp of capital

The flip, step by step

1. Place a buy offer at or just above 2,065 gp (the current instant-sell price).
2. Wait for the fill. Redwood bird house is very liquid right now, so offers usually fill within minutes to a quarter hour.
3. Re-list at or just below 2,065 gp (the current instant-buy price).
4. The GE takes 41 gp tax (2%) per item when it sells, leaving -41 gp profit each.
5. Repeat up to the buy limit (250 per 4 hours), a full cycle is -10,250 gp on 516,250 gp of capital.

Margins move constantly. Re-check the live Redwood bird house numbers and price chart on GrandExchange.com right before committing.