GREAT question - I recommend that you prepare flyers and drop them off personally at the offices that are doing business in your area of interest. Personally, I hate getting unsolictied emails from service providers that I have not met or invited info. I don't mind phone calls, as long as they are respectful of my time. Agents respect personal contact, and repeated contact shows that the person is serious. So, a flyer, then period very short drop ins. Target agents that are currently listing REO properties, and ask them what they need. Once you have one or two, they will provide your name to others if you do a good job.