Can you buy decent running shoes for £50 or less?

We’re doing the Couch to 5K app, and a friend has told us to get £120 Asics shoesEvery week a Guardian Money reader submits a question, and it’s up to you to help him or her out – a selection of the best answers will appear in next Saturday’s paper.My partner and I are into week five of the Couch to 5K NHS running app, and we’re loving it. The only problem is we now think we need some proper running shoes. A friend told us to buy £120 Asics, but we can&r