I agree with DR1, Santo Domingo is the best place if you want to go shopping, but you have to know that there are not many special things to buy in DR, except Amber, Paintings (very very beautiful) and touristic things... If you want to go to Higuey don't waste your money, you can take a public bus almost from the door of your resort which would cost 20 pesos per person,.. Really cheap and will leave you in the center of Higuey, just in front of La Basilica.... It's a nice experience travelling by bus and seeing the local customs... And dominicans are very nice people, they would help you without any doubt...