Samsung Galaxy S4, what's the cheapest way to get my hands on one?

Amizon? Best Buy? Or my Verizon store. I want the gatuntee, can I buy that at a place other than the Verizon store?

should this be in GQ? I don’t know one thing about smartphones, this will be my first. I want it cheap but I want protection too, in case it breaks.

Sorry if the question is a little dumb. I’ve been comparing prices, but I don’t know if I will get a warenty if I go on Amizon or Best buy, or Walmart.