Take a look at the Selling Price to Asking Price ratio: it's now 98% everywhere and 96-97% in the North (Innisfill/Newmarket), where people are getting more desperate. Everything is selling below asking.
A year ago it was 107-110%.
How low will the prices drop?
Another thing that might be cool to see is how the number of listings grows compared to the prev. year (2016):
APR | MAY | JUNE | JULY
+3% | +42% | + 59%| +65%
Now, all these guys (65% more than normal - last year) will be trying to close the position before the Winter comes (otherwise they'll be forced to wait one more year). Note, that those 65% only account for people who maintained their listing and didn't delist to relist later on (after the seasonal drop) in Sep.