If any of the lands which have been offered for sale at the public auction provided in section forty-five of this article shall remain unsold following such auction, or if the Auditor refuses to approve the sale pursuant to section fifty-one of this article, the deputy commissioner may sell such lands at any time subsequent to such auction, without any further public auction or additional advertising of such land, to any party willing to purchase such property. The price of such property shall be as agreed upon by the deputy commissioner and purchaser, subject to approval by the Auditor as provided in section fifty-one of this article.