It's interesting that you should mention this because I mention it in the Domain Ebook.

You're absoluetly right about appraisals. They do value. Largely because they cater to different audiences.

As a seller you should of course go with the highest appraisal. A research appraisal is great for end user sales, but dosen't hold much weight in a resller market (because resellers know what the domain is worth and at what margin they can resell it for in order to make a profit).