Currently Online 
TallSilhouette on 31 January 2017
October-November 2019:
PS4 Super Slim $200 (maybe $150 on big sales)
PS4 Pro Slim $300 (maybe $250 on big sales)
PS5 $400 (may go 'premium' at $500 but less likely)
Give or take based on manufacturer schedules. PS4 still fully supported for a couple years but may gradually get dropped as 9th gen goes on.
