TS - I don't know about charging to your account - back in the day when I first opened my sprint account (10 years ago) I remember that you could charge purchases to your account so long as you had the sufficient 'spending limit'. I have no idea how it works these days though....
I guess what I am weighing right now, is if the 70.00 savings is worth not having the 'peace of mind' of getting it from Sprint or BB/local retailer etc.
So long as I don't get a lemon phone and have to deal with customer service from a distance, I should be fine.
Think I am going to go for it.