Tyrrells Sparkling Cab Sauv @ Wine Lovers Club $110 + cashback
Base cost for a dozen is $110 - $9 cheaper than I've found it at another place and $100 cheaper than others again.
What makes it a reasonable deal I reckon is that the Tyrrells are a pretty secure buy, and the delivery charges at Wine Lovers Club are excellent. So in some cases the delivery fee will be negated by the cashback and in others will make up 30% or so - if you live out in the boonies.
Besides - I like my bubbly reds. I reckon they're one of the better experiments in Australian wines.