------------

Here is a good post to dust off and look at periodically:

Spring 2011 Guide of 30 Key Charts to See Before You Buy or Sell Your Home - by Michael David White - Housing Story.net

Even though it was first posted in April, it is still relevant today. In light of the NAR's 2007-2011 downward revisions of house sales, chart #27 in Mike's piece is spot on.

Other articles for you to read about this: 

1.  Housing Bust to Look Worse With Sales Revised - By Alan Zibel - Back in February, we wrote about problems that analysts had been raising with the National Association of Realtors’ estimates of U.S. home sales and highlighted the possibility that the trade group would have to revise its figures downward. After many months of work, the trade group said Monday that it plans to do just that. The Realtors’ group, which publishes the widely watched monthly report on sales of previously occupied homes, said it will release revisions to home sales for 2007 through 2010 and for the first 10 months of this year. The data are scheduled to be released on Dec. 21, along with the group’s monthly report on home sales in November. - Wall Street Journal

and
2.  Existing Home Sales Debacle, As Larry 'Baghdad-Bob' Yun Confirms Overstatement - Submitted by Tyler Durden - In what can only be described as completely unsurprising, Larry Yun of the National Association of Realtors (NAR) has admitted, according to CNNMoney, that maybe possibly they overstated, purely by accident, the number of existing homes sales statistic that has formed the cornerstone of his constant corner-turning commentary over the past few years. We have unequivocally challenged the Ph.D.'s claims as fudged and fabricated ... - Zero Hedge

and
3. (good read) Lawler on NAR Revisions for 2007 through 2011 - by CalculatedRisk 

and
4.  Michael Olenick: NAR’s Big Miss on Home Sales Underscores Lack of Transparency and Accuracy in Mortgage/Housing Data - By Michael Olenick, founder and CEO of Legalprise, and creator of FindtheFraud, a crowd sourced foreclosure document review system (still in alpha) - Naked Capitalism