Again, I have not made myself understood.
I was in no way ever in my entire life hurt by an appraisal -- never lost a penny. The most recent appraisal I received might have reduced my cash out on a refinancing, but the bank insisted that I take every penny I had asked for and reduced my closing costs.
Thus have nothing to appeal, contest, or sue about.
I am a retired analyst who did analysis for the Executive Office of the President, the Department of Energy, the Department of the Army, the Mayor of Atlanta, the Space Agency, and the Virginia Small Business Development Center.
I am currently interested in appraisal and assessment and want to learn more. I may someday write something about it. I ask questions here to learn from people who actually do assessments. And I hope their answers can help keep me from making an utter fool of myself if I publish something.
I have never utilized multiple regression in a single analysis -- but do not rule it out as an appropriate tool depending upon the specifics of an analysis.
Incidentally, I blind lucked into my current home which among other virtues continued to appreciate in value even as others in other locations across the US took heavy losses.