PAK'nSAVE have some $2 deals, the peanut butter deal seems the best offer - North Island only by the looks. Pams Peanut Butter 375g is $4.49 elsewhere and even 375g homebrand peanut butter is $2.49 at Countdown so seems like a bargain at $2.
There is also Pams paper towel 2 pack for $2, kaiser rolls 6 pack for $2, Pams Water 3L for $2 and baguettes 2 for $2. Check your local store though as the items vary.
Click the link then your local store to see the $2 offers and other specials at your local store.
Annoying, The peanut butter special seems to be only a North Island thing. In South we get Boston buns and butter instead.