Sec. 5.
That in order to accomplish the declared purposes of this Act, and to carry out the policy declared in section 1 hereof, the board is authorized and directed to sell, as soon as practicable, consistent with good business methods and the objects and purposes to be attained by this Act, at public or private competitive sale after appraisement and due advertisement, to persons who are citizens of the United States except as provided in section 6 of this Act, all of the vessels referred to in section 4 of this Act or otherwise acquired by the board. Such sale shall be made at such prices and on such terms and conditions as the board may prescribe, but the completion of the payment of the purchase price and interest shall not be deferred more than fifteen years after the making of the contract of sale. The board in fixing or accepting the sale price of such vessels shall take into consideration the prevailing domestic and foreign market price of, the available supply of, and the demand for vessels, existing freight rates and prospects of their maintenance, the cost of constructing vessels of similar types under prevailing conditions, as well as the cost of the construction or purchase price of the vessels to be sold, and any other facts or conditions that would influence a prudent, solvent business man in the sale of similar vessels or property which he is not forced to sell. All sales made under the authority of this Act shall be subject to the limitations and restrictions of section 9 of the "Shipping Act, 1916," as amended.