50 percent off all pick n' mix boxes at Lindt cafe Chadstone.
Largest size is currently $45
Not sure when it ends. Forgot to take photo. You can fit 1.5 kg of chocolate in a large box, get them to weigh it for you for extra funsies (normal per kg price is 99.90)
At the DFO outlets, especially after holidays like Christmas and Easter, the Lindt DFO outlets often have 1Kg bags of mixed "specialty" chocolates for $25. The Christmas ones were particularly delicious this year and the Easter ones are also, generally, good. Last time I was at DFO they had 1 Kg bags of red velvet balls at $25.