Hello W. I would check with the local board of Realtors to find out info on a particular agent. If the agent you are working with is in San Mateo County, call SAMCAR at 650-696-8200.
I would also check with that agents broker. Once you have found the agent you are looking for, ask for phone numbers from past clients so you will know what to expect.
If you are looking for a listing agent, the difference between a good agent and a great agent is their marketing plan, their knowledge, and their negotiating ability.
Whatever you do, do not go with the agent who promises to get you the most money without a clear cut plan on how they plan to achieve their goal. The worst thing a seller can do is to over price their home.
Whether you are buying or selling, pick an agent who will communicate well with you. Someone who will tell it like it is, not tell you what you want to hear.
You might also want to ask friends and relatives if they have had a good experience with a certain agent.
Good luck W.
Dave "Tap" Tapper