Last minute christmas party pieces

Why is it right just before christmas the stores start having massive sales,just when you are running out of cash.
Here are a few festive party bargains that i have found on the Internet for those of you who are struggling to find something to wear for christmas/new year

                                            
priceless shoes £3


               

                                               

Get the labe £9.99

                 Asda £9

        Debenhams £6