Running shoes can vary in price a lot and it is worth investigating why some are more expensive than others. Go to a shop where you know the assistant knows what they are talking about and get them to talk you through the different shoes and what the differences are between them and why some are significantly dearer than others. If the person you are speaking too is lacking the knowledge of the different shoes go to another shop until you are satisfied with the information. It could be just to do with brands and fashion but it is more likely to do with the technology in the shoe and the features that it has. Think about what you need in a shoe and whether the ones you are choosing between can offer that. It is easy to be tempted to think that the cheapest offers the best value for money or that the most expensive will be of the highest quality but this may not be the case and so it is worth finding out more about them rather than drawing your own conclusions. If you cannot afford the shoes that you need, then consider waiting and saving up for them rather than buying something which is not completely suitable and then having to buy again when you can afford them or suffering from blisters or sore feet as a result of not spending enough money the first time.