You can't get Pliny the Elder in Phoenix. Let's just begin with that truism, since it'll be far easier to explain why not if you aren't spending this whole article wondering about the local availability of the country's most sought-after beer. Ditto The Alchemist and their double IPA, Heady Topper. And anything from Hill Farmstead, Jester King, Kuhnhenn, Surly, Three Floyds or Cigar City. You won't find any beers from any of these breweries for sale in Arizona. Not legally, anyway.
The reason has to do with the Three-Tier System, part of the law governing the sale and distribution of alcohol in the U.S. The regulation was put in place in 1933 as a portion of the 21st Amendment -- the one that repealed Prohibition.