The only sensible thing I see here is the notion that sales volume is important.
Remember sales volume started slowing in 2004, preceding the price peak by a year or so. Likewise, at the bottom, the number of sales will start to increase a year or two before there is upward pressure in prices. It takes a sustained increase in volume to soak up the bloated inventory. I wouldn’t be too worried about rapid upward price movement for at least a year after it is apparent that sales volume has improved.
Sales volume is a very useful indicator (not when focusing on noisy month-to-month fluctuations, but when looking at longer term trends).
