If sole purpose is to resell iPhone 6 after paying $329 (plus sales taxes). Than I suggest you just try to resell water damage iPhone for $150-200 or however much you can resell it.
Because iPhone 6 resell prices hover around $500-550 in most markets (depending on condition and GB size).
So it's very risky to have to spend $329 plus taxes in order to resell for $500-550.