If you’re looking to purchase Bentonite clay, you have several options:
Powdered bentonite clay is available at some health and natural foods stores. You might find it packaged by the pound in a bag or tub, and I’ve sometimes seen it sold in the bulk bins.
You can also buy quality clays from an online vendor. Here you can check the prices on a number of different packaged healing clays. Some of these products are eligible for free shipping.