 Trafford is a prosperous area , with an average weekly income of £ 394 , and apart from Manchester it is the only borough in Greater Manchester to be above the national average for weekly income and is on average the highest in the county . Media , advertising and public relations have been identified as growth industries in Greater Manchester and are concentrated in Manchester and Trafford . Average house prices in Trafford are the highest out of all the metropolitan boroughs in Greater Manchester , 45 % higher than the average for the county . 
