Fairfax Real-Estate Agents: Tips on How to Select the Best Agent Fairfax Real-Estate Agents: Top Tips to Select the Best Agent 1. Compare and Research Agents Comparing Fairfax realtors and conducting research is a vital step in buying or reselling a house. When there are so many real estate agents to choose, it’s crucial to do your research and compare them to find the one that best suits your needs. Research agents online. Look for agents with experience in the Fairfax, Virginia area who have worked with clients that are similar to you. Read reviews and testimonials from past clients