Probably a store-specific deal, the Priceline store at Northland Shopping Centre (Preston, Vic) has a lot of chocolate to shift in the next few days, it appears.
Walking past today, I saw 300g Cadbury Favourites for $5 each (down from $11). There were ~40 boxes at 2pm Sat 12 Jun, and all packets have a best before date of Tue 14 Jun. I'm sure they'll be okay to eat for a few days after at least.
I'm not going to create a separate deal but they also had large trays (~20cm x 40cm tray containing ~40 chocolates) of Belgian seashells also for $5. There were only half a dozen boxes of those and they were wrapped like presents. There are two types of wrapping paper - either covered with stars, or with "merry christmas" written over them so you might be able to pass off the former as a current gift but I think you'll struggle with the latter. Unless you're going to a Xmas in June party. In which case, you look awesome for rocking up with a very well-wrapped themed present (most people probably won't check the best before date if you hand them a big tray of chocolate!).
It's probably specific to this store but if you're in the area and feeling in the mood for some discounted chocolate, go for it.
Hmm, will be there Wednesday, I wonder if they will still be selling them?