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Most young people have older friends who are more than willing to go in the shop for them, mainly because they benefit from the purchase, especially if it's tobacco, as they will be given a few cigarettes as a thank you, or they could do what some young people do, and hang about street corners to ask people to go in the shop for them, or they could goto someones house who sells tobacco from different countries cheaply. Trust me, my friends always have a supply of cigarettes :l