Average prices drop to 2003 levels in 19 out of 20 US cities, with only Phoenix bucking the trend, new survey shows House prices have continued to fall across the US even as the wider economy has picked up, a closely watched survey showed on Tuesday. For the second consecutive month home prices fell in 19 out of 20 cities measured by the S&P/Case-Shiller index, leaving average prices at levels seen in mid-2003. This was the third month in a row that average prices had fallen.