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COMPARE THE COST No one wants to spend hours trawling around the shops looking for a deal. Fortunately, websites like megashopbot.com let you compare costs of items, such as perfumes and books, from the comfort of your own home. For example, Philip Pullman’s latest novel, The Book Of Dust, costs £9 on Amazon compared to £12.99 at Waterstones – saving you 31 per cent.