Here are some advantages and disadvantages of purchasing real estate in San Anselmo, California:

Advantages:
- Location: San Anselmo is located in a desirable area of Marin County, with easy access to San Francisco and other parts of the Bay Area.
- Nature: San Anselmo is known for its beautiful scenery, with several parks and nature preserves in the area.
- Schools: San Anselmo has highly rated public and private schools, which can be attractive to families with children.
- Community: San Anselmo has a small town feel and a strong sense of community, with several local events and community organizations.

Disadvantages:
- Cost: San Anselmo is an expensive area to live in, with high housing costs and a high cost of living.
- Traffic: While San Anselmo is relatively small, congestion and traffic can be an issue during peak commuting hours, and the area can be crowded with tourists during peak tourist seasons.
- Natural disasters: As with much of California, San Anselmo is at risk for earthquakes, wildfires, and other natural disasters, which can be a concern for some homebuyers.

It is important to do your own research and consult with a real estate agent before making any decisions about purchasing property in San Anselmo or any other city.