30% off all Tesco food at Reject Shop.
Some items I have tried that are really good value:
Sunflower oil - 1L for $1.75. Woolworths generic is $3.50 for 750ml
Instant rice 250g - $1.33. Great for camping.
Peanut butter 700g - $2.80. Cheapest peanut butter per gram anywhere, and it tastes good.
Tesco Tuna chunks in spring water 145g - $0.50. Product of Ghana. This is lower quality reddish meat however. The sunflower oil tuna is made in Ecuador.