HARRISBURG - It pays to pick up a bottle of rum or wine for that summer barbecue party while vacationing at the Jersey Shore. The perception in Pennsylvania is that other states have better prices on wine and liquor, so it makes sense to stock up when you're out of state. Maryland stores near the Pennsylvania line say they get plenty of customers from the Keystone State. But a survey of liquor stores in four states conducted by the Harrisburg Patriot-News reveals that prices aren't always better across the state line. In fact, in some cases, Pennsylvania prices are cheaper.