If anyone lives on the west coast or in one of the states fortunate enough to have Trader Joe's stores, on occasion they bring in 15 oz. jars of coarse grey salt from France. Yes. it's just like the Celtic Sea Salt , it's absolutely wonderful and sells for a mere $4.00!
The trick is to buy as much as you can, because it's not always available. In my case, I travel back and forth between east and west coasts, so I lug enough jars back to last me until my next trip and to give away to friends. That makes for a pretty heavy suitcase, but it's worth it!