Selling for about $600 @ BackCountry.com (which is MSRP). Deal only good for today, so if interested, don't wait. Oh, and Western Bikeworks is a great merchant if you're not familiar with them - if you know of a better price, then just post the link (USA merchants only) in their price match section, and they will automatically price match the competitor.
If interested, here's a bit older, but very thorough review, of these pedals by DC Rainmaker back in 2017:
Garmin Vector 3s Power Pedals at WesternBikeworks
Pedals of Progress.
Measuring your power output is essential to advancing in competitive cycling. The Vector 3S Power Pedals from Garmin are an affordable means to progress, featuring single-sensing pedal-based power measurement, cadence recording, and polished, ergonomic construction with an improved stack height for more confident cornering. Installing these pedals is super easy, just like any non-power pedal, without requiring any additional pods or sensors.
The precision machined stainless steel spindle and composite pedal body are highly durable, fit to provide years of reliable use. With up to 120 hours of battery life, these pedals can churn out loads of training, data, and fun before its time to swap old batteries for new. If you decide you require dual-sensing power measurement at some point down the road, Garmin makes it easy to upgrade from your single-sensing system to a dual-sensing system.
The Vector 3S pedals quickly pair with compatible Garmin Edge computers, ANT+ or Bluetooth-enabled devices, and Garmin's Connect Mobile app. Be sure to pair your pedals with TrainerRoad via ANT+ to get the most out of your training, and integrate your ride data, routes, and more with Garmin Connect, Strava, and TrainingPeaks.
- Pair of pedals including one Vector™ 3S Power Pedal
- Includes Cleat hardware.
- Battery type: LR44/SR44 (x2).
- Battery life: 120 hours (with LR44 battery type).
- Max. rider weight: 105 kg.
- Accuracy: +/- 1.0%.
- Cleat type: Keo.
- Stack height: 12.2 mm.
- Q-factor: 53/55mm with supplied spacing washer.
- Measurement location: Spindle.
- Field calibration.
- Adjustable release tension.
- Garmin Connect compatible.
- ANT+ ® and Bluetooth ® connectivity.