An anonymous reader writes "If you own a mom & pop store and can't get rid of some of your inventory, you can always clear out some shelf space by holding a sale. If the Supreme Court sides with business interests in a case they heard today, however, such sales may no longer be possible. Since 1911 it has been illegal for manufacturers to force retailers into setting a price floor for products — individual retailers get to decide how much they sell products for. But today the Supreme Court heard oral arguments in a case seeking to overturn this longstanding rule. Should the Court do so, it would drive up consumer prices across the board. This case is particularly salient in the era of Internet shopping: consumers are now easily able to shop around to multiple retailers to find the best price. The Court could wipe out this advantage." From the article: "Should the Court abandon the... rule against minimum resale price maintenance... it would send a signal that the Roberts Court will continue to narrow the application of the antitrust laws and that the Court may disregard settled precedent and Congressional will in other areas of the law as well."