It was less than a month ago that Apple unveiled its latest smartwatch, but already Amazon has discounted the Series 5's predecessor, the Apple Watch Series 4. The deepest discounts come with the base silver aluminum and white sport band versions of the 44mm models. The GPS model is currently $349.97, down from $429. Meanwhile, Amazon has discounted the more expensive GPS + Cellular variant by $129.03, making it $399.97 to start, instead of $529. The almost 25 percent discount on the latter model is the biggest price drop on the Series 4 to date.