Praise be to Allaah.
It
is not permissible to sell them if the businessman knows that the person
who buys them is going to use them for things that Allaah has forbidden,
because this means that he is cooperating in sin and transgression. But if
he knows that the purchaser is only going to wear them for her husband or
he does not know anything, then it is permissible for him to sell them.