I have also seen this email hitting my inbox and having purchased this wine in the past few months, went to check what vintage that I have.
it is 2018 vintage. Please note the cork enclosure. I could not believe that for $180 RRP wine they could not afford to seal it properly with wax or at least with some metal foil tight wrap. (see the pics).
At the time of the purchase myself and a mate got a dozen to split as Winestar charges (or used to charge) postage and $10 surcharge if bought less than a dozen .
Also worth to note that we paid $32.99 per bottle at the time.
My impressions - it is a very good well made wine however I am not sure if $180 can be justified as its price. We thought for $33 it was a good buy. For $40, hmmm - I would probably wait for DM to offer Sorby Adams The Thing for $50 as that would be $10 well worth the upgrade.
I think Maverick is one of those wine brands in Au that definitely inflate RRP. When I was doing my due diligence before I purchased it I noticed that my fellow countrymen Moscowvites are paying around AUD $364 in a
Moscow online store. Also Redbigot said that couple of folks on his forum reported good things about it.
Now to the quality of wine. It is not a fruit driven/front fruited wine as you would expect of a Barossa region, it is more on a savoury side. It really really needs to breathe to reach its full potential. I noticed that after 2-3 hours decanting you start getting some exquisite subtle dark fruit and a pleasure to drink. It is slightly more acidic(from memory) than I would ideally prefer but it works well to counter the tannins and has a nice long finish.
I am a bit hesitant to recommend savoury wines (Clarendon Hills Merlot 2012 IMHO is a superb drop but requires patience decanting - and some people thought it was horrible) - they really need to be well aired.
So I would recommend it if you are really after some descent Eden valley shiraz, right now (if you can wait - add $10 and hunt for Sorby Adams The Thing). I would not recommend it on the basis of the magnitude of the discount from its RRP that seems for some folks to be the major factor when choosing wine (that is skillfully being exploited by some enterprising labels)!
I might crack a bottle tonite now!