How to Spot a Bad Real Estate Agent The right agent can help you find your dream home or sell your existing home fast, but the wrong agent can ruin both transactions, and leave you in shock. That being said, its interesting how little buyers and sellers give thought to choosing an agent. To start, get as many recommendations from friends and relatives as you can to see which agents are buying and selling the most homes in your area. Be way of choosing a realtor based on reviews online, as online reviews are usually where disgruntled clients post.