He's become a legend, because guys like us made him that, through word of mouth. Now, all of the big guns are taking up his time, so he no longer has time for guys like us. I can imagine, that after so many years of dealing with run-of-the-mill vehicles, his only excitement comes from finding something truely rare or new, kind of like a coin or stamp collector looking to discover that next unknown error or one of a kind item.
I've heard from a lot of people that his service sucks, but then again, he's only one guy, and everybody is after him, so that's what usually happens. Would you be happy if one of his "assistants" verified your car? Of course not, so he has to do it all himself, and just like eveyone else, he's going to pay attention to the big money. He charges money for travel expenses, because that's what consultants do (that's what he really is). In the past, our company has paid consultants thousands of dollars, plus all expenses, for just a few hours of their time. It's the way of the business world.
As far as his prices, I don't think he's all that bad. I have a 71 Corvette that is a possible Baldwin Motion Corvette (very rare). If you want Baldwin to verify a car for you, he charges several thousand dollars, and all he does is look up the VIN number on his master list.
I'm not defending G.G., I'm just saying that there are always two sides. Of course, that is no reason to ignore or stiff your customers, but in the end, it won't really matter. The big guns will always be after him, and he'll be happy to kiss their arses.
My opinion is, and has always been, he's not worth it, unless you have a truely rare car that you want to get a few more bucks out of because of his blessing. Otherwise forget him, and his crap. You can do anything he does with a little bit of research, and the collective knowledge and help of sites like C-C.