Can i trade my iPhone 4s for an iPhone 5c?

So i have an iPhone 4s. I was wondering if I could trade my iPhone 4s for an iPhone 5c. I would probably do this at a US cellular store. Please tell me if you think I would be able to, and how I would - what would I ask/tell them.

If you used a search engine you would have seen that us cellular has a trade in program. I entered in a 64 gb Verizon 4S with a charger and was told the trade in value was only $67.50. That's against $450 for a 5C.

Get a 6 cheapo

If you have Sprint or want to switch to Sprint you could actually trade that phone and get iPhone 6 free. But only till September 30

Not sure what makes you think you can trade it in for free, of course not. You would have to pay to get the 5C but they would give you whatever the trade in value for 4S is.

Sell it and add/save more money to it and buy the iPhone 6