The bonds shall be sold to the highest and best bidder at not less than their par value and accrued interest. The corporate authority shall advertise for proposals to purchase the bonds. Such advertisement shall be published at least once in a newspaper having circulation within the county or municipality, as the case may be, at least 10 days before the date for opening the bids. The corporate authority may reserve the right to reject any and all bids and to readvertise for bids.
50 ILCS 450/8