This is the time to stock up on white wine. Rieslings from Australia represent excellent value now that Australian reds have risen in price. Italian whites and American Chenin Blancs are also value for money. The wines have an uncanny likeness to Bordeaux and Rhone ones. It pays to shop as if you are planning to buy a large consumer item.
Prices vary from one store to the next.
There is no one shop that does the best deals in town for all kinds of wine though. So be prepared to do some footwork. However, there is another way. Get onto the mailing lists of all the shops. Then, you can compare prices from the comfort of your armchair.