We are offered wines of high quality which we know the supplier is unlikely to offer again. A one off. That is the thinking by brands such as the Barossa Valley Wine Supply.
The last was back in 2009. Just so all of this is clear the dictionary says, ‘While you're at it, look up one-off as well: done, made, or happening only once and not repeated. something done, made, or happening only once, not as part of a regular sequence. One of might look and sound similar to one off, but that's like saying ham and hamster can be used interchangeably.’
The Barossa Valley, the district, is then also a one-off as no-where else comes close. Thus expect all the flavours you have come to expect from Barossa Shiraz as that is what this wine delivers. Let's say it's one of a kind.