http://tavma.blogspot.com/2009/05/economics-of-optimal-number-of-vendors.html
The blog says it moderates and will only publish a comment after approval. Based on some of the other comments, I have little doubt I'll be approved, but you all know how I feel about blog moderators changing or disallowing comments after I have taken the time and effort to write them, so I'll post my comment here, as well:
The simple fact is, it takes a certain amount of time and effort to do each appraisal. If you are going to do a decent job, there is very little, if any, economy of scale in getting multiple appraisals from a single vendor. My appraisal fee is what it is and no amount of quantity ordering could induce me to lower it. In fact, in my experience, it is a much better business model for the appraiser to have many vendors who each only order a few appraisals a year... this protects the appraiser from fluctuations in the vendor's business. However, it is also a much better deal for the vendor to spread the business among multiple appraisers. This protects the vendor from the possibilities of an individual appraiser or appraisal firm becoming overburdened and not being able to provide good service.
