r u guys kidding me?
The 5c is an iphone 5 with cheaper build quality and heavier and thicker. The 5s has a 64 bit chip, better camera, and finger print scanner. Go for the 5s, don't listen to the other people, for the same price the 5s is new, and superior
"Cheaper" build quality is not a fact. I could say 5 c is more durable because it's plastic, but that's an opinion.
The options are 5 or 5c. The question is why would anyone want an iphone 5 on a two year contract? Granted the. 5 and 5c have basically the same tech, but the 5c is a "new" model. It's not discontinued. Also IMHO the 5c design is better and more durable.
To ask why would anyone ... That's just you! You can't speak for everybody because obviously millions have already bought the 5c and I know some that "side graded" from an iPhone 5