Location, Location, Location

Bottleshops of Adelaide all follow the convention of posting a sign out the front that advertises the day's price for a carton of Cooper's Pale Ale. The same way that petrol stations advise motorists of the going rate of unleaded petrol.

Of course, you could just go to Dan Murphy's where they have the best price for everything, and extensive range. It just depends if there's a Dan Murphy's close to the BBQ you want to be driving to.