(a) No county governing authority, any member thereof, or any other county officer authorized by law to use public or county funds for the purchase of goods or property of any kind for public or county purposes shall purchase such goods or property from any store in which such county governing authority, any member thereof, or other county officer is an employee, or in which he is directly or indirectly interested, or from any person or partnership of which he is a member or by whom he is employed, unless by sanction of the majority of the members of the county governing authority or unless it is made clearly to appear that such individual, partnership, or owner of the store offers and will sell the goods or property as cheaply as or cheaper than the same can be bought elsewhere.

(b) Any county governing authority, any member thereof, or any county officer violating subsection (a) of this Code section shall be removed from office upon proper proceedings instituted by any taxpayer in the county. Any contract made in violation of subsection (a) of this Code section shall be illegal.