So the cruise ship people are misleading crusiers at least? I often hear "you save 40-60% compared to retail in US..." on the ship, especially during those port of call shopping lecture. That is not ture at all?

I actually was thinking to buy few investment grade jewelries onboard or at port of call. $50K or over is no problem. Then I wanted to flip them once I come back to North America to sell it. In theory I can get at least $100K right?