I don't think the OP should be penalized for wasting our time, but it would be advisable for him to get a book on grading so he doesn't waste his own time. Chris
Good to MS70, they're still only worth bullion value (which incidentally is sinking and still seeking a bottom.)
For grading Kennedy half dollars, this link might be helpfull ..... http://www.pcgs.com/photograde/#/Kennedy/Grades