"Where good times start" (and keep on rolling!)
First of all, thank you very much Melbournians and especially Borgeman!
http://australian-postcodes.com/success.jpg
http://australian-postcodes.com/proof.jpg
Click for higher res
So i didn't have any BigW brochure at all, just the printout of Borgeman's receipt. Told the chick at service desk my mate had got K-Mart to price match as seen in the printout. Things didn't look good, she spent a good 15 mins on the phone to the BigW in the same center... then finally returned and said they only had the 2 pack on sale. So in my most polite, innocent voice i suggest 'Isn't there anything you can do, the product number is the same, and it is definitely K-Mart!'. So she calls the manager and lo and behold, without any convincing he just says "Match it!!!" So she rings it up, and just as she's about to say $23.73 please, boom the 20% kicks in too :)
Your mileage may vary!