S.C. Code § 58-13-610
Any railroad, steamboat, express or other transportation company which shall have had unclaimed or refused freight, not perishable, in its possession for a period of sixty days in the case of unclaimed freight or thirty days in the case of refused freight, may, after having given the consignor and the consignee, when known, written notice, by United States mail or otherwise, of its intention so to do, proceed to sell such freight at public sale at such point as it may deem to the best interests of all parties concerned and out of the proceeds may retain the charges of transportation, storage and demurrage on such freight and all other lawful charges assessed against it, as well as the expenses of advertising, when it has been advertised, and sale thereof. The expenses incurred in advertising, if advertised, shall be a lien upon such freight in a ratable proportion, according to the number of articles, packages or parcels, if more than one.
S.C. Code § 58-13-610