The "peer" system used here has a major advantage.
When you send your domain to be appraised by an expert you may get the effects of his/her personal bias on a domain name. They also may want to please you since you paid them
WHen someone responds with an appraisal here on dnForum, most likely others will correct him if the original appraisal post seems way off. This is the beauty of this system.
Of course you learn not to take anything as written in stone as nothing is. But the brainstorming that takes place is invaluable any way you look at it (weeding out some sarcasm etc).
This is the best way to benefit from appraisals posted on this site.