Garmin makes some of the best fitness watches in the business, especially if you’re a runner or a triathlete. Several models are on sale for Prime Day, including the Forerunner 255 and 955. But you may want to act fast—Garmin deals often sell out quickly.

Fitness tracker deals that match Amazon prices, and some even blow them out of the water — but act fast, these huge discounts will not last long.

While Fitbit deals are still scarce, there are plenty of big price cuts from Samsung, Garmin, Apple, and more.