To be honest, it will be rare for me to score one ...

To be honest, it will be rare for me to score one on these higher than 3. Lots of typical shops. Tours seem to depart out of building 4. You can get a local tour for $25pp right at the tender pier. Note on tendering, you are anchored about 5 miles out, plan an hour for queuing, getting on, transit and getting off.

Special note, there is a pharmacy that shows some US prescription medications as apparently available over the counter.