I have learned to be a little more critical in grading Bufs from pictures. I am going to break from the crowd here and say a net AU-58. The weak hair and feather seem to be worn as this is a common rub point and this doesn't look like a weak strike to me. The reverse is considerably better, but I see very slight wear on the bottom of the hump just above the front leg. Nice overall eye appeal, especially with the toning.
Colin