The average price of a single-family home in Calgary has dropped for the third consecutive month and in October was more than $53,000 less than it was in July when it hit a record $505,920. * _2 B8 x* P9 N: s9 Y% n ! ]; X. c6 U. Phttp://www.canada.com/calgaryher ... ee7aa2f&k=35625