I think DM is price beating Coles/Liquorland in this deal. https://www.ozbargain.com.au/node/236993
Tried the merlot, IMHO, quite drinkable. The lady at the counter said it can be drunk now, but I think it might do with a few years in the cellar.
You can stack this with 7% cashback from cashrewards and on top of that use 10% Big W giftcard to pay.
If you looking for a drinkable $5 red try Wine Men of Gotham Shiraz