Boston condo sales data

1/1/09 – 11/29/09
Boston Condos Sold: 276
Boston Condo Avg. $: $518,438
Boston Condo Median $: $315,500
Boston Condo Avg. $/SF: $533

1/1/08 – 11/29/08
Boston Condos Sold: 259
Bosron Condos Avg. $: $418,148
Boston Condos Median $: $319,000
Boston Condos Avg. $/SF: $447

What are your thoughts on the Boston condo sales data?