How to flip Dragon javelin(p++) in OSRS

Flipping Dragon javelin(p++) on the Old School RuneScape Grand Exchange currently makes about 415 gp profit per item after the 2% GE tax: buy near 863 gp (the instant-sell price) and re-list near 1,304 gp (the instant-buy price).

• Buy at (instant-sell): 863 gp
• Sell at (instant-buy): 1,304 gp
• Margin after 2% tax: 415 gp (48.09% ROI)
• Buy limit per 4 hours: 11,000
• 24h volume: 31,174 (very liquid)
• Max profit per limit cycle: 4,565,000 gp on 9,493,000 gp of capital

The flip, step by step

1. Place a buy offer at or just above 863 gp (the current instant-sell price).
2. Wait for the fill. Dragon javelin(p++) is very liquid right now, so offers usually fill within minutes to a quarter hour.
3. Re-list at or just below 1,304 gp (the current instant-buy price).
4. The GE takes 26 gp tax (2%) per item when it sells, leaving 415 gp profit each.
5. Repeat up to the buy limit (11,000 per 4 hours), a full cycle is 4,565,000 gp on 9,493,000 gp of capital.

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