I'm not sure, it's not something I typically drink. I've found most spirits to be comparably priced (gin, vodka, rum, cognac) so I imagine it would be similarly priced. If it's your drink of choice it could be something worth bringing down as I'm not sure how common it is. Maybe someone else can speak to availability?
crown royal is very expensive in Negril,much cheaper to take that with you if that's what you prefer....