I agree that the price is very reasonable! I have a "Red Dragon" that is non-grafted; can't remember what I paid for it now, but I DO remember that it seemed quite exorbitant! And that I bought it largely because it wasn't grafted, and because I like plants with dark leaves
I also have half a dozen "regular" filberts that are a couple of years old, hoping to get some nuts from them one of these days... do the contorted filberts produce nuts, and can they be grown from seed?