S.C. Code Ann. § 47-7-20: Public sale of estrays.

Any person finding an estray may take possession thereof and shall, if the owner is not found and no claim to such estray is made within three days, deliver or report the finding and taking up of such estray to the nearest magistrate, who shall sell such estray at public sale after ten days' notice posted in three public places in the county, one of which shall be the courthouse door.