This is a tough one that the TPGs might just go MS 63 with. I see what appears to be rub on the hip, horn, tail (reverse) and maybe a bit on the knot and braid (obverse). Maybe you can tell whether it's weak strike or wear in hand. If it's a weak strike (and therefore UNC) I like it for the price. If it's wear, I agree with AU-58 and I don't like the price so much.
These always give me problems. I can rarely tell the difference in this condition.
I like the overall appearance.