Amazon currently offers the 16-pounds of Boxiecat Premium Clumping Clay Cat Litter for $3.69 + tax if you clip the $2 coupon on the product page and by checking out via their subscribe and save program (for an additional 5% off).
This is high quality clay litter that we have been using happily for years, alas, never this cheap!
https://www.amazon.com/Boxiecat-P…s=boxiecat