We are living in the City of Basel, Switzerland. From our place it takes about 10 minutes by car to either Germany - OR - France. Since each item and product category has different price levels and quality in all three countries and crossing the border within the Schengen Area is fast as well as smooth we have compared thoroughly and now go grocery shopping, haircutting, eating out and much more in three nations sometimes in less than 2 hours a weekend.
Loving this tri-national geographic arbitrage and currency play right in front of our door.
Wine, red meat and certain cheese is just great from France, Germany has wonderful beer, good bread and diary products while in Switzerland we buy the chocolates and the gas for the car. Very often we can even claim back the value added tax pre-deducted in France and Germany while re-entering Switzerland.
Not sure whether some of you do this living around the US/ Canadian or US/Mexican borders?