As Marilyn mentioned get a good buyers agent! RealEstate.com, REALTORS offers information and connection with a local agent in minutes. We have information on over 2 million listings and have local agents in your area. Just visit the site, call or e-mail us and we will connect you with alocal real estate agent right away.
Get a good buyer's agent!! The entire point of the Multiple Listing Service is to share business. You don't need to contact the listing agent to see the home. A buyers agent can show you the home and will represent you in the negotiation of the purchase if you choose to write on that home. If that home doesn't meet your needs the buyer's agent will then find other homes that might work for you. The listing agent represents the seller-the buyer's agent represents the buyer. While many listing agents do both sides you are free to have independent representation. Be aware however that the seller pays both agents. The listing agent negotiates the rate of pay and the buyer's agent has no control over her commission. If you do go this route the buyer's agent may ask you to sign a contract stating that when you do buy you will use this agent-thus protecting herself from working for no pay. Good luck.
If it's a bank owned property it may be hard. "REO agents", although not all are extremely difficult to get a hold of for various reasons. Some are either exteremly busy and just don't respond. The good ones usually have an assistant handaling all their property inquiries. Google the listing agent/office name and look for alternative numbers. Office, mobile and then keep trying and eventually they will ansewer or the recptionist at his/her office will point you in the right direction (his/her assistant).