I can see it more like this:
July 2007
60gig PS3 EE - $499
August 2007
60gig PS3 EE - $499
80gig PS3 no EE - $599
4th Quarter 2007
60gig PS3 EE - discountinued
80gig PS3 no EE - $499 (possibly $449)
2nd-3rd Quarter 2008
80gig PS3 no EE - $399
100-160gig PS3 no EE - announced
1st-2nd Quarter 2009
80gig PS3 no EE - discontinued
100-160gig PS3 no EE - $399
3rd-4th Quarter 2009
100-160gig PS3 no EE - $299
2nd-3rd Quarter 2010
100-160gig PS3 no EE - $199-$249
Prediction (June 12th 2017)
Permanent pricedrop for both PS4 Slim and PS4 Pro in October.
PS4 Slim $249 (October 2017)
PS4 Pro $349 (October 2017)