Ok, so this my main point. You have super high-end companies like Bentley and you know that their cars are not worth double or even triple the price of a BMW. But, what you do get is the notice or the celebrity status that comes along with owning a car like that.
I don't know anything at all about Bentleys, but I seriously doubt that "notice or... celebrity status" is the only thing that separates a Bentley from a BMW. Whether whatever differences are worth the difference in price is something that each individual must answer for himself.
However, in Alex's case, I cannot even think of famous clients that use Alex. Sure, a lot them were his clients in the past, but now, he has two famous clients, Tom Wolfe and the Rockefellers. It seems like you are paying for a great product, but then again, there are many great products out there. Right?
Buying a product because some celebrity does is a pretty sorry reason. Look, read about his process and about his fabrics. I don't think that you'll get a comparable experience anywhere else. Whether you would find that experience superior and, if superior, worth the money, is an individual judgment.