Look you are not really going to get much for "Einstein" not trying to flame here. But even 20m would be overpaying. For reasons such as "Einstein" could stand for a normal person's name...
And look at our rigged society now... how many people actually are gonna study about Albert Einstein in the future? Close to 5% maybe.. or less than that. The past is the past. Nobody dwells in the past anymore. And who gives a damn if he creates the atomic bomb or whatever scientific research he has made? The future lies in our hands, and it's our role to work hard in the PRESENT to make better for our future.
And even so. The name "Albert Einstein" would have probably be worth more than your "Einstein" alone. That would be a definite conclusion. Since Einstein can stand for John Einstein or whatever, and who the **** is John Einstein anyways? So if you added the Albert in front, it would have been much better.
But oops. Runescape usernames are not long enough, and thank god for that, some of the rare names are off the boundaries.
That's just my two cents. Good luck peoples.