Years ago you could get good deals at many duty free shops, now most of them seem to trade on the perception of low prices rather than true low pricing. The best I have seen lately is to buy at local grocery stores in places with low liquor taxes generally, with the best deals on locally produced items. My recent experiences are Mexico (1ltr Kahlua for $8.00 US, for example), Cayman Islands, Belize, St. Thomas ($3.00/ltr for local rum), and Italy. I didn't look for Gin, but in Italy even US produced liquor (Jack Daniels, among others) was way cheaper (best prices at the grocery stores) than here in the US. The prices at the duty free stores in the airport were poor, and only appeared to be reasonable if you didn't consider the Euro->Dollar exchange rate.