S.D. Codified Laws § 32-6B-4
No person may engage in the business, either exclusively or in addition to any other occupation, of selling, offering to sell, or displaying new or used vehicles, without a license as provided in § 32-6B-12. A violation of this section is a Class 2 misdemeanor. Any subsequent violation that occurs within two years from any violation of this section is a Class 1 misdemeanor.
The term, offering to sell, as used in this section, does not mean traditional advertising. However, the term includes the physical presence in this state of a new or used vehicle offered for sale by a person not exempt pursuant to the provisions of § 32-6B-5. For an emergency vehicle dealer, as defined by § 32-6B-1, the term includes the submission of a bid proposal for the sale of a vehicle if the bid proposal is offered in response to a bid request originating in this state.
SDCL 32-6B-4