Ebay offers Garmin Rally XC200 Dual Sensing Power Meter Pedals for $699.99 (reg. $1,199.99) with free shipping. 

Product Description:
Rally XC200 is tested to the extreme, so you can ride there too. This dual-sensing power meter delivers reliable power measurements and is easy to transfer between bikes, no matter what bike you’re on or where you're riding.

• It installs like any other pedal and is easy to swap from bike to bike. Yes, really.
• It’s more than just watts. Advanced cycling dynamics show left/right balance and more.
• Take a deep dive into your performance by measuring total power, cadence and more.
• Clip in with ease. These pedals are compatible with SHIMANO SPD cleats.
• Edge cycling computer compatibility and the Garmin Connect app makes software updates and data uploads easy.
• Sync data to your favorite apps for even more analysis, data sharing and route planning.