That Mount Rushmore commem is pretty cool. Ive never found one of those before. For some reason it seems some of the '89's I find are in nice AU condition also. The commem should have a little value more than face if its in decent condition but the '89 probably isn't worth much more (if any) than fv. But if you collect clad halves the '89 still might be worth keeping and adding to your collection.
Good luck and HH!