This is what I was talking about, Slayer. True, the VGA does not officially "appraise" anything. They do, however, apply a "grade" to games which are used in turn to impact resale value. This is appraisal in all but name only. They can even say that their 'gradings' can increase prices for sales.
What are the benefits of selling a graded item?
Graded items will normally sell for much higher prices than un-graded items. You will be able to sell graded items faster and easier through the mail and internet.
(
http://www.vggrader.com/faq.aspx#benefits)
As I posted initially, they do multiple things wrong as faux appraisers. They maintain absolute secrecy which defies all standards of ethics. They do not post credentials. At least a name, degree, experience (they post years but not what they did during those years), etc. would be fine. They have a long way to go from validity.