Bonds, in an amount not to exceed three million one hundred fifty-five thousand five hundred five dollars, may be issued from time to time as, in the discretion of the Marketing Authority, seems necessary to meet the cost of the construction of the improvement necessary to operate a regional market or markets as determined by the Marketing Authority. Such bonds shall be denominated on the face thereof “Regional Marketing Bonds of the State of Connecticut”. Such bonds shall be sold at not less than par and accrued interest.