You can compare the prices on Amazon and Wal-Mart and see for yourself.
Right now, Amazon is selling the natural clay cat litter for $7.99 (a savings of 50% off their normal price). Meanwhile, Walmart is selling the product for $25.42.
Now, maybe I'm missing something here, but from my best estimates and comparison, I'm not. Both products say 18 pounds, have the same packaging and appear to be exactly the same. Please send me a message if you find I've made a mistake here. Otherwise, I would say go for the deal. And if you're an Amazon Prime member, you will get free shipping and delivery within 2 days!
Here is the Precious Cat Ultra Premium Clumping Cat Litter on Amazon: for only $7.99
Here is the Precious Cat Ultra Premium Clumping Cat Litter on Wal-Mart for $25.42.