Around here, you can pay more for any given item based on the rent a store pays.
Certain stores, e.g., Banana Republic, have higher prices at the "fancy" mall with the high-end restaurants than they do at the regular mall. The rent is one factor, but also the people who shop at the fancy mall aren't exactly bargain hunters.
I'm really glad you said that. I thought I was crazy because the prices at the mall I frequent seem much higher than the online price for the same item. So I'm not crazy? (I mean, about this?)