On a recent trip to Food Basics on Oxford St and Highbury Ave, in London, I got:

8 lbs navel oranges ( reg $ 6.99) sale $3.44 ( saved about 55 %)

Oasis Smoothie 1.75 litre
( reg $ 3.79) sale $1.88- ( $1.25 off coupon from Allen's apple juice) = $0.63 ( saved about 85 %)