By joining the WineMarket Facebook profile (link attached), you will be entitled to $15 off any order at their website, http://www.winemarket.com.au. Postage is $5/case flat rate to anywhere in Australia.
After joining their FaceBook profile you will be sent a coupon code which, when used on their website, will deduct $15 from the total of the order. Not sure if this can be used with a single bottle of wine or one or more products under $15, but it does mention "No Conditions" in capitals.
Anyone with wine expertise want to weigh in on prices?
I don't think you can buy just one bottle from the site. The prices are listed per bottle, but when you add an item to your cart, you're adding a case of 6.