I went back to PDS Live and got the sales volume for 2008 which I inadvertently cut out when copy pasting across - here is the full data:
year 2007 volume 99 average $1,198,918 median $939,000 growth 12.8% low $147,000 high $7,000,000 q1 $788,750 q3 $1,500,000 iqr $711,250
year 2008...