Buying Digicell SIM and minutes

Has anyone bought a Digicell SIM in Ocho Rios and used the Digicell TopOff for minutes?
We have an international quad band GSM unlocked phone but I have used it in Europe not in the Caribbean
Do you have any idea of the price for a SIM?

Thanks
John

we use digicel all the time on our trip to CSA cost almost 15 us for 1000 minutes back to the states. Very easy to work with etc...they actually sell them in the gift shops however we go across the street from the resot and its cheaper