The reason I told you only to get 50 resume pictures done, is because, that is usually the minimum of the photo shop and for now we are only physically going to give photos out to the agents. Do not do mailings to agents, it will only go into the waste paper basket, especially if you are non-union. It is a waste of money for pictures and postage. Look at things like the agent's location to you, who they take, and how big their clientele, etc. Then physically go with photo-resume in hand to each one of the five you have picked.
All agents have a reception area and a receptionist.
Tell the receptionist you are looking for representation. A lot of times it will be very busy at the agency. The least thing a receptionist will do is ask you for your photo-resume. Get to know the receptionist by their first name. After two or three days call the receptionist.