When the probate court is satisfied that it would be for the advantage of the creditors of the assignor to sell part, or all, of the real or personal property in this state assigned for the benefit of creditors at private sale, it may authorize the assignee or trustee for the benefit of creditors to sell it either for cash or upon such other terms as the court orders. No real property lying in this state shall be sold for less than two thirds of its appraised value, nor shall any personal property be sold for less than two thirds of its appraisement, unless upon good cause shown the court orders the assignee or trustee to sell it for a less amount.