Macworld Whether you’re going back to school or looking for a new work laptop, there’s never been a better time to get a new M3 MacBook Air. Over at Amazon, it just got a brand new best price as the 13-inch laptop dives down to $850 and the 15-inch model gets a price cut to $1,050, a savings of $250 and the lowest price we’ve ever seen. When we reviewed the new MacBook Air with an M3 chip, we gave it a 4.5-star rating and our Editors’ Choice award. Even though we tested the 15-inch model, it’s basically identical to the 13-inch model other than the screen size. And let us tell you—it’s pretty …