Zoopla Property Rich List (UK)
These lists provide information on the top 20 highest value streets, areas and towns (and the lowest) by country in England, Wales and Scotland. The website uses what they call The Zed-Index! which is the current average Zoopla! Estimate of home values in a given area. Although this data should be used with caution, it does give a good idea of where to look for potential donors.