the PX sold most things for about the same price you would pay in a typical convience store. Not as bad as a lot of the other places we stoped, but a tad more than buying from a grocery store. Except of course no tax. We bought the bulk at a Target and only bought milk and a few candy/gum items the kids wanted at the PX. They do have reasonable prices on souvineers, autograph books, etc.... They have a bit of everything in an emergency.... but I wouldn't have used them for all the necessities for the stay.
regards