We are raiding the Guardian long read archives to bring you some classic pieces from years past, with new introductions from the authors. This week, from 2022: Gary Hersham has been selling houses to the very rich for decades. At first, £1m was a big deal. Now he sells for £50m, £100m, even £200m. What does it take to stay on top in this cut-throat business? By Sophie Elmhirst. Read by Andrew McGregor. Help support our independent journalism at theguardian.com/longreadpod