I have been domaining as a hobby for about 4 years and have learning more and more from the start. I followed a link to valuate.com which has opened my eyes to other areas in the field. one aspect of their site is their appraisal engine powered by estibot (2.0) which is the most information packed appraisal generator out there that i have found. It has been a big help in my search for actual domain value. Go there and find out the best part. IT'S FREE !