I would be incredibly surprised if you could find a 2 bedroom garden flat for 320 in good condition. You are completely right, it varies from house to house and road to road. ED continues to change as more people are descovering it and property still remains cheaper than in neighbouring areas (clapham, herne hill, brixton etc) or north london. A manager from Foxtons told me about nine months ago than their branch in ED is their busiest in london with over 9000 people registered on their books. Several people I know who have moved to ED over the past two years and who have bought 2 bed houses/flats have all paid in excess of 400. Admittedly they have been in areas near good schools and shops.