S.C. Code § 59-31-270
Upon the resolution of the county legislative delegation any county or school district may abandon its rental or free system of textbooks and accept the provisions of this article. Upon any such county or school district abandoning its rental or free system and accepting the provisions of this article, the State Board of Education shall make, or cause to be made, an investigation and shall determine the value to the State of any textbooks belonging to such county or district which can reasonably be of use to the State under this article, and the Board shall purchase such useful books from such county or district, paying therefor either in cash or in such installments as may be agreed upon between the State Board of Education on the one hand and the county board of education, or trustees, as the case may be, on the other hand. In the event it be agreed to pay therefor in installments, the State Board of Education shall enter into reimbursement agreements with such officials to pay such installments in the future.
S.C. Code § 59-31-270