From a review at Boing Boing of the new Galaxy S4:

Purchase and service costs over two years start at $2,069.75 with Sprint–add $100 if you’re not porting your number over–then $2.069.99 at T-Mobile, $2.359.75 at AT&T and potentially 2.599.99 at Verizon.

That’s the only way that really makes sense to share what a phone costs. It’s not the upfront price. It’s what it costs you over the long term. And it really makes clear the different between Sprint and Verizon.