Section 402A of the Restatement (Second) of Torts provides that a user or consumer injured by a defective product may seek redress from the product seller under a theory of strict liability. Nevertheless, Pennsylvania courts have held that not every entity with a role in putting a product into the hands of consumers is a "product seller" within the meaning of Section 402A. Entities like brokers, auctioneers, and second-hand markets have been exempted from the definition of "product seller."