This is probably store by store, worth checking if you find yourself inside Americas most wonderful retailer. I purchased 2, left around 10 on the shelf.
Yea no purple near me. All they had was the "all-season" 0 degree stuff for $1.50.
Bought the last 20 or so of those and I add 1 summer formula washer fluid tablet to them. Works well in summer so better than nothing and all the other more expensive stuff right now.
They didn't have any of the ST purple, but I snagged 4x of the brand name with "Rain-X" for $2.50/ea. That'll keep our 3 vehicles stocked through the summer.