Allowing Semenya to compete as a lady might be a blessing in disguise. The pressure on the real lady athletes running against a man might make them train even harder and in a few months we will have a lady [or ladies] who can actually run faster than Semenya. At that point, Semenya will 'write' a book, have a movie done about her and she can then retire in peace.
Never count on making a good sale. Have the purchase price be so attractive that even a mediocre sale gives good returns.