I found my favorite lubricant on clearance yesterday when I .. (OnlyFans)

I found my favorite lubricant on clearance yesterday when I was at a different store-location than usual.  They had a ton of it.. meanwhile at my main store they stopped stocking it and no longer have it as a shelf option  - only more expensive lubes remain.  Why :cry: Whyyyy :sob:   It was on clearance for 2.64... how many should I go back and buy?  I currently already have 2 unopened and one open of the non-generic type.