I had a look at those races on betfair
Stately Dash $16.50 best TAB price $15
Sweet Talking Guy $11 best TAB price was $9.50

Once you deduct the 5% commission the prices were
$14.72
$9.50

I still find the longer priced runners better value with betfair, the shorter priced runners are at times lower than you could have got from a bookie.

The Tab for some is the only option if you are a winner because trying to get the bookies to take your bets or getting them matched on betfair midweek can be a problem at times.

Multiple Tab accounts is a good option, no problems getting set you get a middle price and you can spread your money around so as not to effect the price to much.