How to flip Blood Moon tassets in OSRS

Flipping Blood Moon tassets on the Old School RuneScape Grand Exchange currently makes about -75,567 gp profit per item after the 2% GE tax: buy near 6,300,001 gp (the instant-sell price) and re-list near 6,351,463 gp (the instant-buy price).

• Buy at (instant-sell): 6,300,001 gp
• Sell at (instant-buy): 6,351,463 gp
• Margin after 2% tax: -75,567 gp (-1.20% ROI)
• Buy limit per 4 hours: 15
• 24h volume: 803 (moderately traded)
• Max profit per limit cycle: -1,133,505 gp on 94,500,015 gp of capital

The flip, step by step

1. Place a buy offer at or just above 6,300,001 gp (the current instant-sell price).
2. Wait for the fill. Blood Moon tassets is moderately traded right now, so fills can take an hour or more, patience pays here.
3. Re-list at or just below 6,351,463 gp (the current instant-buy price).
4. The GE takes 127,029 gp tax (2%) per item when it sells, leaving -75,567 gp profit each.
5. Repeat up to the buy limit (15 per 4 hours), a full cycle is -1,133,505 gp on 94,500,015 gp of capital.

Margins move constantly. Re-check the live Blood Moon tassets numbers and price chart on GrandExchange.com right before committing.