S.C. Code Ann. § 56-16-140
(B) A person who fails to secure a license as required in this chapter is guilty of a misdemeanor and, upon conviction, must be fined:
(3) not less than one thousand dollars nor more than ten thousand dollars or imprisoned for not more than two years, or both, for the third or any subsequent offense.
For purposes of this subsection, the sale of each motorcycle constitutes a separate offense.