[header] How to buy duty free [title] Find a duty-free store. [step] The first step to buying an item duty free is to locate a duty-free store. Duty-free stores can typically be found at any location that caters to or serves international travelers. 
Common locations for duty-free stores include international airports, towns and cities along an international border, cruise ships, ports, and on board certain international flights. [title] Determine if it's worth buying duty free.