They say 'valid for 2 days only', but don't say when the 2 days started - so sorry if it expires before you see this!
I've tasted their Cab Sauv and I think Verdelho & though I gulp at the thought of paying $20 a bottle it is a very nice wine. And the 187ml bottles are a handy size for a picnic or party, good bargain for free.
Note the case needs to be purchased from the Vineyard Selection (which is everything on that page except maybe the Pinot Gris. Not sure if you can get it if you order 2 x 1/2 cases, would be worth asking - they're a family winery and so might be more open to it than the big guys.
Their winery at Mt Cotton is a really nice place to visit for a day trip too if you're in Brisbane (I recently went for a car show)