Found this online, yes it's probably 99% a mistake, but let's see if we can get it! It's unavailable online, but tomorow I'm going to see if I can get this for the same price in-store.
EDIT: Confirmation that it is not available in-store, you can order it off here: http://www.bigwentertainment.com.au/product/back-to-the-futu… (Thanks jonishere!)
and using the code "MEDIBANKBIGW" (Thanks btaussie!) you can get it for $15.80 posted. The item is currently 'On Order' so right now we're awaiting to see if they will be shipped or not.
EDIT 2: The page above is now dead, it appears they have finally realized what's happened. The real thing now is to wait and see if they honour it.
Predators BR (2010) is $12.87 on the Big W website: http://www.bigw.com.au/entertainment/DVDsBluray/DVDsBluray/b…
Let's price-match this one!
I had the same issue with the copy I got in store. I just went back the next day, with the receipt, and asked them to open it up for me. Sales guy remembered me and was slightly reluctant, but what was he going to do - not open an item I paid for??
Other option is to grab a couple of strong magnets (hard drives are a good source). From memory you hold one at opposite ends and sides of the case lock and move it up to unlock. Maybe that was for locked DVD's…