First off, I have never purchased from this dealer, although I have viewed his website many times, and also his display at the MAX & SOS for many years.
I'm primarily a cloth headgear guy, and Oakleaf has a LOT of them; virtually any branch, waffenfarbe, and rank. Therein lies some of the problem, methinks, as some are undoubted fakes, and he should know better, especially when someone with more money than knowledge and/or brains makes a $5,000 mistake.
I would say that most of his visor caps are good, although overpriced, IMHO. The faux HG cap mentioned earlier in this thread is a prime example of one of the site's stinkers. Anyone who knows a bit about visors knows that a pebbled underside to the peak is a dead giveaway to a fake.
Well. he's one of the "big boys", and comments by we mere mortals on the forums, mean little or nothing to him. Nevertheless, caveat emptor.