These were previously on special at 2 for $1 - http://www.ozbargain.com.au/node/44235
I'm well aware that these are a big step down from the original Twix but if you're like me and just want a cheap chocolate fix then $0.39 is hard to go past.
The box in the photo was the only one I could see on the shelf and being a discontinued line I'm sure there aren't any more.
I haven't see them at the other Woolworths on Murray St, Perth for those wondering.
Its an ok deal I guess.
For anyone else who can't get this deal, Aldi sell a twix knock off very cheap every day and IMO it tastes better then this.