Got an email which said:
Purchase 3 products valued at $29 or more in one transaction online, between 8pm AEDST and 11:59pm AEDST tonight and they will send you a $30 store credit.
Worth a try :)
UPDATE: Just read terms and conditions. Needs to be $29 or more for each product before delivery to obtain the store credit received no later than 19th December 2011 (via email) and valid until 31 January 2012.
Full terms and conditions here: http://www.thegoodguys.com.au/cons/groups/public/documents/w…
Title needs amending… you need to spend a total of $87 to get the $30 not $29 as shown.