the sale is whilst stocks last and typically they'd sell until everything runs out. So in jan, you might still see something. if you're in transit, check out the duty free tod's stores in terminals 2 and 3. they have their year end sale in january so it's a good chance to buy even more for less.
thanks for the info Jadiete,i will check the duty free shop as well.... hopefully there will be some bargain left for me....