I get mine from Rural King, todays online price picked up at the store is.
Diamond Crystal Solar Naturals Salt Crystals for Water Softeners, 40 lb. Bag - 100012411
$5.99
SKU 7710115
When Culligan delivers it runs $8.99
I'm going to make a run to RK after work, see what it is here.
Bought mine at Lowe's last night, normally Lowe's/HD/Walmart/RK are within .50bg around here.