The July 4 sale has already begun, and Amazon is having its best Apple Watch sale of the year, but it probably won't last long.

For a limited time, Amazon is offering the Apple Watch Series 3 (GPS/38mm) for $169. That's $30 off and the best Apple Watch sale we've seen. If you want a cheap smartwatch, take advantage of this sale; given how rare the Apple Watch 3 is, this will likely be the lowest price until Amazon Prime Day.

The Apple Watch 3 is one of the best smartwatches out there. It's also super affordable compared to Apple's current smartwatches, which start at $399. In our Apple Watch 3 review, we loved the watch's fitness tracking features, design, and speedy performance.

The Apple Watch 3 has a waterproof/swimproof design and built-in GPS to accurately track pace and distance when running outdoors. Only the 38mm model is available for sale, but I'm not going to complain about the price.