S.C. Code Ann. § 36-9-504
(1) A secured party after default may sell, lease, or otherwise dispose of any or all of the collateral in its then condition or following any commercially reasonable preparation or processing. Any sale of goods is subject to the Chapter on Sales (Chapter 2). The proceeds of disposition must be applied in the order following to:
(4) When collateral is disposed of by a secured party after default, the disposition transfers to a purchaser for value all of the debtor's rights in the collateral, discharges the security interest under which it is made and any security interest or lien subordinate thereto. The purchaser takes free of all of these rights and interests even though the secured party fails to comply with the requirements of this part or of any judicial proceedings: