Hi System,
The prices on Betfair are usually better than any TAB
Go to Betchoice & there one will find the results with the various prices.

Many services take the Betfair price at 5 secs till jump.

Normally the best price is acquired around the 20 secs & less mark.

Just a note to others who may not know.
When comparing the value difference, one should always compare the Fractional odds , not the decimal odds.

Example.
Decimal odds
2.00 TAB
3.00 Betfair
Price difference to BF 50%

Fractional odds.
1/1
2/1
Odds difference to BF 100%

This difference is very common with Betfair .

There may be a problem getting fully set at the price you want if one wanted to make a very large bet.

There is another mob called Dialabet who own BetEZY
They also have best of 3 TABs on Horses, Dogs, Trots.
All races Prov, Metro, Country.

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Cheers.