Another vendor at our market sells green garlic and it's immature garlic. I was aghast, as you Ken! WHY would I pull up my garlic before it was mature? Like you said, way too expensive to do that. Now, if it's a special kind of garlic, maybe. In fact, what this vendor may be pulling is Elephant Garlic, which is not really garlic at all. I haven't priced it but I'm guessing it's no where near as pricey as the good varieties of garlic we are growing.
I did see some scapes on a few garlic today. Whew! I was getting worried. But we planted both hardneck and softneck (several Creoles)