On the Betfair exchange, if backing, click the SP (blue) button on the runners that have the stake already calculated.
Enter the stake in the white box. Click submit. The order is sent to Betfair to match at their BSP. Historically, especially on the bigger prices, the prices can be 16%+ better. (used to be 20%+).
There is also a set SP odds minimum (small white box) that can be used. I don't use it personally, just let it cook.
In theory, you're doing this just before the off time, the price is already acceptable, but the BSP could be better. On balance, not too much in it either way I reckon.
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Just to throw it out there.
With dutching and not using the BSP, you could use the Betfair platform to set the dutch bets at the prices you already want to take.
The light blue stake (?) button can be clicked, the total amount to stake is input, then the dutch profit already appears far left in green. The liability in this example is £9.99 (I put in £10 is just adjusted)
One issue though is when putting in the odds you want, the market can move away when you submit you order. Some get matched, some don't.
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