Preheat oven to 350 degrees.If using a store bought crust thaw it first before starting the recipe. Place the eggs,coconut,sugar,buttermilk,butter, flour and vanilla into a stand mixer. Using the whip attachment, beat the ingredients until well combined. If using a hand mixer, place the ingredients in a large bowl and beat until the ingredients are well combined and look creamy. Place the filling into the pie shell, bake at 350 degrees for 45 - 50 minutes or until the pie is lightly browned on top and a toothpick inserted in the center comes out clean.