Apple today adjusted its estimated trade-in values for select iPhone, iPad, Mac, Apple Watch, and Android smartphone models in the United States, with some devices slightly increasing in value and others seeing decreases. Trade-in values increased by $10 or $20 for many newer devices, including the iPhone 13 and iPhone 13 Pro Max, and the latest iPad Pro, iPad mini, MacBook Pro, and MacBook Air models. Apple Watch SE values rose by up to $10, while Apple Watch Series 6, Apple Watch Series 5, and 12-inch MacBook values increased by up to $5. Some older Apple devices saw their trade-in values decrease by up to $10, such as the iPhone X, iPhone 8, and iPhone 8 Plus, while Android smartphone…