".and my take on that was the big volume and sales that went...

".and my take on that was the big volume and sales that went thru in 2009/2010."

You cannot possibly put 2010 and big volume in the same sentence.

"This week?s Property Pulse highlighted that nationally, property sales volumes were at their lowest level in more than a decade (the lowest since 1996 actually)" Cameron Kusher, RP DATA http://blog.rpdata.com/2011/03/suburbs-with-the-greatest-number-of-transactions-during-2010/

Volumes crash, then the prices follow.