How to flip Fish crate (empty) in OSRS

Flipping Fish crate (empty) on the Old School RuneScape Grand Exchange currently makes about 117 gp profit per item after the 2% GE tax: buy near 616 gp (the instant-sell price) and re-list near 747 gp (the instant-buy price).

• Buy at (instant-sell): 616 gp
• Sell at (instant-buy): 747 gp
• Margin after 2% tax: 117 gp (18.99% ROI)
• Buy limit per 4 hours: 250
• 24h volume: 22,931 (very liquid)
• Max profit per limit cycle: 29,250 gp on 154,000 gp of capital

The flip, step by step

1. Place a buy offer at or just above 616 gp (the current instant-sell price).
2. Wait for the fill. Fish crate (empty) is very liquid right now, so offers usually fill within minutes to a quarter hour.
3. Re-list at or just below 747 gp (the current instant-buy price).
4. The GE takes 14 gp tax (2%) per item when it sells, leaving 117 gp profit each.
5. Repeat up to the buy limit (250 per 4 hours), a full cycle is 29,250 gp on 154,000 gp of capital.

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