How to flip Rosewood blowpipe (empty) in OSRS

Flipping Rosewood blowpipe (empty) on the Old School RuneScape Grand Exchange currently makes about 37,987 gp profit per item after the 2% GE tax: buy near 905,119 gp (the instant-sell price) and re-list near 962,353 gp (the instant-buy price).

• Buy at (instant-sell): 905,119 gp
• Sell at (instant-buy): 962,353 gp
• Margin after 2% tax: 37,987 gp (4.20% ROI)
• Buy limit per 4 hours: 8
• 24h volume: 619 (moderately traded)
• Max profit per limit cycle: 303,896 gp on 7,240,952 gp of capital

The flip, step by step

1. Place a buy offer at or just above 905,119 gp (the current instant-sell price).
2. Wait for the fill. Rosewood blowpipe (empty) is moderately traded right now, so fills can take an hour or more, patience pays here.
3. Re-list at or just below 962,353 gp (the current instant-buy price).
4. The GE takes 19,247 gp tax (2%) per item when it sells, leaving 37,987 gp profit each.
5. Repeat up to the buy limit (8 per 4 hours), a full cycle is 303,896 gp on 7,240,952 gp of capital.

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