A license authorizes the licensee to do business as a dealer only at the address for which the license is issued. Notwithstanding subsection (a) of this section, a dealer who holds a license under this subtitle may: make purchases at an estate and judicial sale; and transact business at the residence of the owner of a precious metal object or a place where the owner keeps a precious metal object: on request of the owner; and after giving written notice of the proposed transaction and its location to the local law enforcement unit with jurisdiction over that location.