This sort of pains me to post this because of all the drama last week with Kmart but in case you are in need of water softener salt this is a pretty good deal. There is a $1.50/2 Diamond Crystal Water Softening Salt coupon here on Coupons.com.
Diamond Water Softening Salt $4.99 (smallest bag)
$1.50/2 Diamond Printable Coupon
= $3.49 a bag after doubled coupon