Sophisticated companies advertise goods by mail that are never delivered. You might have someone come up to you on the street and try to sell you a watch or television which has supposedly been stolen. Cheap and worthless imitations of expensive goods are often sold on the streets. You cannot win this game. The spectators then get excited and lose their own money very quickly.
Many confidence games exist.
Your local police department will probably have a publication that can help you avoid them. Your local public library might also have some information. Chapter Home Life in the USA Home Page . You'll be able to access all 18 topic areas of this site. Also you'll find a link to the guestbook.