No, they are not a problem, nor is this a grey area, they are 1000% legal to buy and sell in the United States. Even importing books for the sole purpose of res

No, they are not a problem, nor is this a grey area, they are 1000% legal to buy and sell in the United States. Even importing books for the sole purpose of resale is legal. https://en.wikipedia.org/wiki/Kirtsaeng_v._John_Wiley_%26_Sons,_Inc https://en.wikipedia.org/wiki/Kirtsaeng_v._John_Wiley_%26_So.... >Kirtsaeng v. John Wiley & Sons, Inc., 568 U.S. 519 (2013),[1] is a United States Supreme Court copyright decision in which the Court held, 6-3, that the first-sale doctrine applies to copies of copyrighted works lawfully made abroad.