Do you mean the 2007-08 housing crash, or something else in 2005? If the 2008 one, it had a lot more to do with the financial side than the actual real-estate s

Do you mean the 2007-08 housing crash, or something else in 2005? If the 2008 one, it had a lot more to do with the financial side than the actual real-estate side, so changes in the real-estate sales process aren't likely to fix that problem. The "primary" dollar value involved in housing-price declines was significant but not really enough to cause an economy-destabilizing financial crisis. But the primary price declines in actual real-estate were multiplied many times over because the mortgages were all piled into heavily leveraged securities, priced based on risk models that turned out to be very inaccurate. That caused a crisis that ultimately involved dollar amounts greater than the total value of all the involved real estate. A loose analogy: if you buy stock with 100:1 leverage, and the stock price declines 10%, you lose 1000% of your original investment. The big problem here wasn't really the 10% decline in stock values (significant but not catastrophic), rather the fact that you had 100:1 leveraged exposure.