What is best buy?? Best buy is when you are given certain prices for different amount of products and you have to decide which one has the cheapest value. To find the best buy you have to divide the product price by the number of products it has Example: The pack of 35 cost £600 The pack of 3 cost £12 £600 35= 13.14 Each chocolate bar in the £600 pack cost £13.14 £12 3=4 Each chocolate bar in the 3 pack cost £4 So the 3 pack one is cheaper and you get more for your money than the other one. So if you buy the 3 pack one you save your money.