Keep reading to learn the things I won’t buy (and how to avoid temptation) on my next cruise. At that point, if the cruise ship offers it, utilize a photo package to obtain the best deal possible. (I might be dreaming a bit) Lucky for him, I won’t be pushing him to purchase an expensive piece of jewelry from a cruise ship. While you are on a cruise ship, there are no other stores in their direct competition. What have you purchased on a cruise ship that you won’t dare buy again?