Dominica Port has shops available that sell liquor at relatively low prices. You'll find the best variety of shops selling liquor in Roseau. This is Dominica's main port city at which most ships dock. Rum is a popular liquor to buy from this region. Another popular liquor sold primarily in restaurants is called Sex on the Spot. Wine from local vineyards is also a popular buy with visitors. The easiest places to buy liquor at are Shillingford Estate, Whitchurch, Cocorico and Belfast Estate. To find duty-free liquor and other items, visit the Duty Free Emporium in Roseau.
For more info, see Dominica Port Guide