In this subtitle the following words have the meanings indicated. “Merchandise” means any commodity, object, wares, or goods. “Person” includes an individual, corporation, business trust, statutory trust, estate, trust, partnership, association, two or more persons having a joint or common interest, or any other legal or commercial entity. “Sale” includes any: Sale of or offer or attempt to sell merchandise for cash or credit; or Service or offer for service which relates to any person, building, or equipment. “Service” means any: Building repair or improvement service; Subprofessional service; Repair of a motor vehicle, home appliance, or other similar commodity; and Repair, installation, or other servicing of any plumbing, heating, electrical, or mechanical device.