Free, but usually a cost.

Just because it's free, doesn't mean it's the best choice! Free domain name appraisal services do exist. However, they often are one-stop quick automated scripts that do not accurately address the true value of your domains. Your domain appraisal will be free, but the agency may try to up-sell you on other products and services. When you add up the time and cost it takes to handle all the aspects of domain appraisals, listings, and advertising of your domain name sale, it makes sense to approach one of the companies that actually specialize in this field.