[notaustinpowers]

I'm not entirely sure on that but I have no data to back it up, just personal experience. The south (GA, SC, FL, etc) has the Port of Savannah which is the 3rd busiest in the US (right behind Los Angeles and New York). Yet we have some of the most expensive food items, especially in Atlanta which is a massive nationwide distribution hub due to our railways and highways.

EDIT: Makes sense for fruits and vegetables mainly, due to California's agriculture. But shelf-stable and prepackaged goods still maintain a very high price even over in the South.