1 Year into a 2 yr Verizon contract: I have a 5s/32 and want to upgrade to a 6/64. A $300 rebate makes this free. It locks me into 2 more years which is ok since Verizon is the only decent service here. What if I wait a year? I'll own the 5s by then but it's unlikely that it will have resale value of more than $300, right? The value of the phone next year will be about the same as the value of the rebate today. It seems like a no-brainer to take the deal as long as the contract extension isn't an issue. Am I missing something?