Each week, I report on the current state of the Boston real estate market, using data pulled from the local multiple listing service, MLSPIN.

This week, I included average and median sales prices during the past thirty days. I started reporting these numbers just a couple weeks ago. I didn’t report these figures in 2007 or 2006 or 2005.

I pull last year’s numbers from blog entries I wrote, last year. Since last year’s blog entries don’t include average or median sales prices, I can’t report them.

I didn’t pull the data from last year because 1) I didn’t have the time; 2) I didn’t think it was being reported in MLSPIN (but, I see now it is).

This is as good a time as any to start using Listing Information Network, Inc. (LINK) data instead of MLSPIN. MLSPIN only includes listings entered by real estate agents whereas LINK includes ALL sales in the city, pulled from the Suffolk County Registry of Deeds. This means, basically, that LINK data is “more accurate”.

So, here is this week’s real estate sales report for the city of Boston, compared to this week, one year ago.

Condos and Single-Family Home Sold Statistics last 30 days, 2007

Listings sold: 448
Avg. $: $507,190
Median $: $350,000
Avg. $/SF: $468
Avg. DOM: 78

Condos and Single-Family Home Sold Statistics last 30 days, 2008

Listings sold: 283
Avg. $: $487,926
Median $: $338,750
Avg. $/SF: $460
Avg. DOM: 110

Condos Sold Statistics last 30 days, 2007

Listings: 398
Avg. $: $495,528
Median $: $352,000
Avg. $/SF: $496
Avg. DOM: 76

Condos Sold Statistics last 30 days, 2008

Listings: 247
Avg. $: $494,754
Median $: $335,000
Avg. $/SF: $510
Avg. DOM: 117

Condos Boston Proper Sold Statistics last 30 days, 2007

Listings: 244
Avg. $: $607,747
Median $: $432,500
Avg. $/SF: $551
Avg. DOM: 74

Condos Boston Proper Sold Statistics last 30 days, 2008

Listings: 139
Avg. $: $684,642
Median $: $448,000
Avg. $/SF: $596
Avg. DOM: 109

While Boston condo and single-family sales volume has dropped over the past year by as much as 40%, average sales price has dropped by less than 4.0% and median sales price by less than 3.4%, including all foreclosures and short sales.

While Boston condo sales volume has dropped over the past year by as much as 40%, average sales price has dropped by less than $1,000 and median sales price by less than 5%, including all foreclosures and short sales.

While Boston Proper condo sales volume has dropped over 40%, average sales price has increased over 12% and median sales price by more than 3.5%.

** Boston Proper neighborhoods include Back Bay, Beacon Hill, Charlestown, Chinatown, The Fenway, Financial District, Leather District, Midtown, North End, Seaport District, South Boston, South End, Theater District, Waterfront, and West End.