If you are buying a house I would really look for a realtor that you feel comfortable with and work with just one. you will have the full benefit or an agent but it will not cost you anything. Doing it this way is very beneficial
1. because they can eliminate a lot of leg work for you, you might see several homes that you think may be a good fit but he/she will have the upperhand knowledge such as a bad foundation, moldy basement, etc.
2. She will help you negotiate for the best deal. Remember the selling agent works for the seller, they owe fiduciary duty only to the seller as their client not to you as the customer.
3. She will see what is coming on the market or the day that it comes on. A good home at a good price will sell quickly, you need to get in and see it early and not wait for weeks to read about it in the newspaper only to call and find out that an offer has been accepted.
WATCH OUT though! When talking to a realtor ask about a buyers fee. I know many large companies are now charging $500-$1,000 but they dont' tell you about it until you are at the closing table and read about it in your HUD statement. Ask first!