That would be 180 out from my experience. Cheapest places I've seen are Aldi's or Kroger's. The dedicated places have better selection in the larger cities but the prices are never lower.
Maybe you just have to know the owner? Most stuff there is the same or less than CVS or WalMart and they have good sales. If I am making my fruit concoctions and need more than a bottle or two of something in particular, I just go in and order a case and she gives me a case price.