If you were selling your house, would you require your realtor to have actually sold houses prior to trying to sell yours? How about just taken a real estate course or tried to get licensed? Wouldn't some background in real estate be important? Any background?
Actually, I'd probably list it as a "sale by owner" and avoid the commission costs.
You've also conveniently failed to mention that Glass was the President of the Super Bowl committee, something that probably encompasses all the skill set required of an AD but that none have ever had the distinction of doing.