Mealey's (September 24, 2020, 1:19 PM EDT) -- PHILADELPHIA — A customer of Amazon.com Inc. who was injured by an item purchased from a third-party seller on the retailer's online marketplace filed a stipulation of dismissal with the Third Circuit U.S. Court of Appeals on Sept. 23, leaving unanswered a question over online retailers' liability in such situations that had been certified to the Pennsylvania Supreme Court (Heather B. Oberdorf, et al. v. Amazon.com Inc., No. 18-1041, 3rd Cir.)....