I have nevr looked at my ER statement. Today I did and scrolled down to the bottom. There was a link to get a cellarmasters $50 off a $120 spend link. It appeared to be tied somewhat to my card, so I have decided not to post it. If you have an ER card, you might check your statement and see if you have an opportunity to get one of these vouchers.
this is a permanent discount:
http://www.cellarmasters.com.au/vouchers/vouch50.aspx