Enough of the sweet spot (over the center of the face, with the most mass below) is still good, that if the price is nice (less than $2 a lb) I'd definitely consider it. Casual inspection makes me think the whole face isn't going to delaminate, and I personally rarely use the step at the horn, and honestly prefer anvils without them.
If anvils are common in your area, you may want to hold out for a nicer one, but the face is otherwise quite decent. I wouldn't personally bother repairing. For $1-1.5lb I'd ride it till the wheels fall off.