I must have posted this 3 times today....
I know where you can get it shipped to your door. Not as cheap as picking it up locally, but for those of us with no Home Depot within a several hours drive (even so, they won't buy anymore this season since it is for "sandboxes" as they say)....
Email me, and I will tell you how you can get it for $10 for a 50 pound bag. Shipping, in my case to Iowa, was $16 a bag.