How Do You Know if You're Getting Scammed?

The books are all basically free, or close to free. Ten dollars for a book is essentially free. And there's all these tactical books too, that you can get just on any of these tactcle things. They shouldn't be two thousand. You shouldn't add two zeros yo'. Take two zeros off. So it's basely a scammd then if they're trying to upsell you on stuff constantly, you're getting scammed....