Samsung Galaxy S6 Edge 32GB
On a 2YR Max Plan = $0
On a 2YR Smart Plan =$144
On a 2YR Standard Plan =$550
***Edited title***
Hi @lunar_cow and welcome to the Community! 
If you have an agreement right now, you'll need to pay the remaining balance on your current phone to be eligible for a renewal with a new phone. You can check the balance by logging into your account under the My Service section.
Also note that the prices mentioned by @KAPABLE-K are subject to change at any time.
Cheers!
