I'm on Verzion family share plan and I've got three months until my every two year phone upgrade. I want to upgrade to the 700p now but it would cost $620 vs $500 three months from now. Any suggestions on how to avoid the $120 premium?

I would have to upgrade my plan as well. Would that be a way to convince a VZW manager to give it to me for $500?

Thanks in advance,
Mowgli