All warrants issued hereunder shall be sold to the highest bidder at public sale unless sold at a better price within 30 days after failure to receive any acceptable bid at a duly advertised public sale in accordance with this section. A public sale shall be either on sealed bids or at auction. Bidders may be invited to name the rate or rates of interest which the warrants are to bear or the board of education may name a rate or rates of interest and invite bids thereon. The notice of a public sale shall state whether the sale is to be on sealed bids or at auction and shall also state the amount of the warrants to be sold, the maturities thereof, whether county or district tax is to be pledged, the amount payable at each maturity and either the rate or rates of interest which the warrants are to bear or that the bidders are invited to name the rate or rates of interest and shall also state the time and place of the meeting of the board of education at which bids are to be received and the amount of the good faith check required to be deposited. Such notice shall be published once in each of two consecutive weeks in a newspaper published in the county within which the warrants are being issued, and if there should be no such newspaper the notice shall be published in a daily newspaper published in Montgomery or Birmingham. The first of such two publications shall be not less than 10 days before the date of sale. The board of education shall have the right to reject all bids. In the marketing of the said warrants the said board shall be entitled to have such assistance as can be rendered by the Governor, the Treasurer, the Director of Finance, the State Superintendent of Education or any other appropriate state officer or agency. If the warrants are offered for sale at public auction, the highest bidder shall be that bidder whose bid names the lowest net interest cost to the board of education as shown in standard bond tables; if the warrants are offered for sale on sealed bids, the highest bidder shall be that bidder whose bid names the lowest total net interest cost to the board of education determined by ascertaining the total amount of interest that would be payable by the board, computed at the applicable rate or rates of interest stated in the bid from the date of the warrants to their respective absolute maturities, and deducting from the total so ascertained the amount of any premium stated in the bid in excess of the face value of the warrants or adding to the total so ascertained the amount of any discount stated in the bid below the face value of the warrants; provided, that the determination by the board of education as to the highest bidder shall be final. Bidders shall be required to submit a good faith check, drawn on a member bank of the Federal Reserve System, in the form of a certified check or a bank cashier's check or a bank treasurer's check, in an amount not less than two percent of the principal amount of the warrants offered for sale.