$20 is what the original should have sold for in the first place. (Well, it should have been free in the first place, but $20 is less outrageous than $60).
Also, keep up the cloning. Eventually the blueprints will fall into the right hands that will forget to secure it.I'm not knocking the clone, who knows, maybe someone will find a way to get the latest TB firmware on it, but as an entry level dongle for what it costs it's still worth the money. But only just.