For business start ups - think outside the box

Most of the successful businesses are the unique ones. Take for example Starbucks. Who would have thought that selling gourmet coffee would take off so big. If you have a hobby look into making money from it. Either by writing a blog abut your passion or selling what you make or grow. Maybe you have a hard time finding an item for your hobby. If that is the case can you make and sell that hard to locate item for a profit?