Before you buy anything online, get to know the seller. You need to know their contact details in case something goes wrong; a reputable business should make this information easy to find. A reputable business should also have good customer feedback - do friends, family or other customers rate them...

Are you clear about the payment and delivery processes including method and important dates? Does the seller have a complaints procedure in place for if things go wrong? Do they provide customer support for any queries or problems? Is the sale a done deal when you click the ‘I agree’ or ‘I accept’...