How to flip Eclipse Moon chestplate (broken) in OSRS

Flipping Eclipse Moon chestplate (broken) on the Old School RuneScape Grand Exchange currently makes about 17,784 gp profit per item after the 2% GE tax: buy near 563,000 gp (the instant-sell price) and re-list near 592,636 gp (the instant-buy price).

• Buy at (instant-sell): 563,000 gp
• Sell at (instant-buy): 592,636 gp
• Margin after 2% tax: 17,784 gp (3.16% ROI)
• Buy limit per 4 hours: 15
• 24h volume: 272 (moderately traded)
• Max profit per limit cycle: 266,760 gp on 8,445,000 gp of capital

The flip, step by step

1. Place a buy offer at or just above 563,000 gp (the current instant-sell price).
2. Wait for the fill. Eclipse Moon chestplate (broken) is moderately traded right now, so fills can take an hour or more, patience pays here.
3. Re-list at or just below 592,636 gp (the current instant-buy price).
4. The GE takes 11,852 gp tax (2%) per item when it sells, leaving 17,784 gp profit each.
5. Repeat up to the buy limit (15 per 4 hours), a full cycle is 266,760 gp on 8,445,000 gp of capital.

Margins move constantly. Re-check the live Eclipse Moon chestplate (broken) numbers and price chart on GrandExchange.com right before committing.