Boxes of Coles branded sandwich bags located near the deli.
I think these are on clearance due to change in packaging so they might be at other stores, there was approx 50 boxes at Picton NSW.
They don't normally go on sale so I grabbed a few pricehipster
Shelf price tag was $2.70 but scanned at $1.80
Edit: thanks @stratbargin check your local for 30m Coles cling wrap $0.55