Obviously i'm dealing with someone that has no idea or experience in what they're talking about. Belgians are about half of what a good shepherd is easily, they aren't even close in price. I think its safe to say you've never imported, never bought, never trained any of these dogs. When you do then get back to me. If his GSD's are that bad, he needs to find some new suppliers. It's a rare rare day when a white passes the testing to become a PSD, and its even more rare for Mal's and such to be more expensive than a good GSD. SOunds like he needs to find some new people to work with.
Its obvious i'm stepping on your friend's toes, so if you don't want to believe what i'm saying, go to some real working sites and ask them. Come back and tell me what they say, or just keep it to yourself, it doens't really matter.
http://www.workingdogforum.com/
http://www.uspcak9.com/cgi-bin/yabb2/YaBB.pl
http://www.leerburg.com/forums/ubbthreads.php/ubb/cfrm