Would have answered you sooner, however am just getting back to town after a week's travels.
That grading system in use by the buyers of our fav herb is very subjective, as you mentioned.
I may be sounding a gong here, but want to write the following;
Another factor is what buyers do with their roots once they have finished buying them. I have heard of buyers that keep their piles of purchased roots in graded piles in optimal storage conditions until shipment. Once they are ready to ship, will mix piles to \"flush\" out the weight of a given shipment, or for a given order.
This is dilemma for we who are selling. For this example, think of this:
I represent my product as being grown a certain way, under certain circumstances, and certain conditions -say woods grown- and thus sold as that with the price paid to me reflecting all that.
And, IMHO, is also a congruent ethical problem on the buyer side. Following my example: If a buyer has a customer in china that wants only wild root, and a certain amount is promised by the local buyer I sold to, then the local buyer mixes wild-looking woods-grown roots in it and sells it as wild. The buyer is going to get a price paid for wild. As you can see, the roots going over to china are not all wild.
In following this logic, not only is efficacy of the root possibily affected, the integrity of the entire transaction after I sold my root is changed to a degraded state. It seems criminal to do this, to me.
Not to mention that my root that I have carefully grown under my circumstances becomes involved in this. All from a buyer's lack of integrity. In this example, I was paid for woods-grown roots, however are being sold and shipped internationally as wild. Big, huge inconsistantcy.
Oh, well, will get off my point now.