Did you buy your phone from Best Buy? I don't think it would be a good idea to trade in your S7 for the Edge, but you could possibly exchange them for a fair trade. I checked the trade in value for the S6 (I used mine for example: 64GB, white, Verizon), and the range of conditions extended from 'Good', 'Fair', and 'Broken'. Even with the highest condition selected, they only offered me less than $200. I'm sure you would get more, but you would probably have to take it into the store physically and let them determine the value of your phone.