When buying a cruise, especially one that lasts more than a week, the best investment you might want to make is to buy a Saturday edition of one of the British newspapers.

Why? Because the cruises and itineraries offered in those newspaper ads are often not only wildly different than the ones offered to U.S. customers, but the prices can also vary dramatically.

In fact, the longer the cruise, you may notice that the price is better.

Consider the cost of a 120 day, around-the- world cruise, purchased in the U.S, for a cruise that departs and then returns to America. The per person cost can average as high as $600 a day.

But a 120 day, around-the-world itinerary that starts and ends in the United Kingdom and goes to some different and amazing destinations can be as low as $77 per person.