expired Google Play $20 Digital Card for $16 (20% off) @ PC Game Supply
20% off gift cards for the next 2 days or until they run out of stock.
Payment can be made via Paypal or Credit Card.
Product Terms and Conditions
o AUD gift codes redeemable only to Google Payments accounts with an Australian address
EDIT: Looks like they have put on a limit of "1 per customer". :(