IGA's latest weekly catalogue in Victoria has Coca-Cola 2L varieties (inc. Sprite, Fanta, Lift) at $2.10 each. This is a pretty decent price to stock up at, given Woolies still sell them at $4.35 a pop; Coles cheaper at $3.
This deal doesn't apply to all states, I had a quick look at Adelaide City Centre IGA and they were $2.40 each (still cheap!) but it pays to view your local catalogue and find out.
Enjoy!
Thanks OP turns out it's $2 at my local iga. I'll go grab some tomorrow to go with my endless gaming sessions now school holidays are on!