Usually $4 each.
Spotted in the international section of Coles World Square, but the ticket format suggests Australia wide if your local Coles carries the item.
If you haven't tried these before, they are orange/chocolate mini-cakes very popular in Britain.
I remember long ago, at my favourite Coles store,
How I used to roll Jaffa cakes down the aisle,
I can’t do that anymore, they just stick to the bloody floor,
And the Jaffa cakes get squished up in a huge pile.