How long after a new version of a phone before the old phone gets a price drop

I've been watching the HTC one M8, and decided to wait because with the M9 coming out in April i figured price would drop significantly. But i dont know if my current phone will last a couple months.

Submitted March 31, 2015 at 03:50AM by benyfur http://ift.tt/1bKNnmO