People often say “for one” when they mean “for one thing”: “I really want to go to the movie. For one, Cate Blamchett is my favorite actress.” (One what?) The only time you should use “for one” by itself to give an example of something is when you have earlier mentioned a class to which the example belongs: “There are a lot of reasons I don’t want your old car. For one, there are squirrels living in the upholstery.” (One reason.)
BUY THE BOOK!