In the "good old days" a good adversarial attorney inevitably exposed evaluation for what it really was…. a "guesstimate". A good guess and estimate of the horse's value that was full of personal bias and very insupportable from a scientific standpoint.
Congress mandated that the industry clean up it's act and in the aftermath, a new system of appraisal was developed. We use a system of mathematical formulas instead of guesses, which is the standard for any type of personal property appraisal today.