Just at Wollies and saw these on the clearance rack. Best before September so still got plenty of life left in them.
Not sure what the mint flavour is like, but they're pretty cheap so might as well find out!
EDIT
On the right of the photo you can see $5.99 for 480gram mixed boxes. They were all sold out at the time but new stock just added. Down from $29.99 so pretty good price.
They've had this before at the same store! About two months ago… I bought about six packets, but they all melted in the car :( Selling them for $12.40 is a rip off (150 grams of chocolate). $2.40 is a good deal. $5 or less should be a fair price for that much chocolate.