Osem kosher for Passover vinegar for $1.77 per bottle

Amazon has a 12-count box of kosher for Passover Osem vinegar for $21.24 ($1.77 per 34 oz. bottle), with free Prime/SuperSaver shipping.

I don't buy pricey kosher-for-Passover salad dressings.  Instead, I make salad dressing from scratch with vinegar, oil and spices.  Buying KLP vinegar is a major frugal buy for me.