I have an iPhone 4S but I want to upgrade?

I have a iPhone 4S from verizon that I got May of 2012. I want to upgrade to the 5s. But I'm not eligible for an upgrade till may of '14. Does anyone work for Verizon know the price to just upgrade even though I'm not eligible for it?

The one thing I can say is, get the old good technology. The samsung galaxy s3 was 200 dollars until the galaxy 4 was releases. Now its 40. Oh, and upgrading is usually about 50-100 dollars extra depending on the phone