Macworld If you haven’t heard, Apple has announced that the Apple Watch Series 9 will no longer have a working blood-oxygen sensor while its patent dispute with Masimo works its way through the courts. Thankfully, you can still get one and it’s on sale right now: Amazon is selling the 41mm Apple Watch Series 9 for $329 and the 45mm model for $359, a savings of $70 each and matching the lowest price we’ve seen. The Apple Watch Series 9 has the same 41mm and 45mm displays as the Series 8 with two new features: an S9 chip that’s faster and smarter with a new four-core Neural Engine, and the new d…