No not Sams, I buy from a Beverage Company that distributes many different lines of Soda and Beer. If you can find a local distributer that sells to the public, they tend to have better prices. I buy from Greenco Beverage Co. in Greenville, SC.
There's the rub, as the expression goes. I'm doubt many of them are even allowed to sell to the public if they were inclined to. I know it's a different product, but I once asked Nintendo about selling games directly to the public, and the response was that their contracts with retailers prohibited them from doing that. This was years before retail electronic software distribution (Wii Shop, etc.)
In particular I expect Coca-Cola to be the same way.