If the total amount of land to be sold at any one sale consists of more than 50 acres, the board of appraisement shall consist of:
(a)
One member who is an officer or an authorized appraiser of a banking corporation formed under the laws of this State, or the manager of a branch bank of such banking corporation, or an officer or cashier of a national banking association, having a place of business in the county in which the parcel or some portion thereof is situated.
(b)
One member who is an inheritance tax appraiser of the county in which the parcel is located.
(c)
One member, a disinterested person, who is a licensed real estate broker, selected by the two other members of the board.