Used Powertap P1 V1 pedal power meter. MSRP around CAD900. I bought them last Sept but prefer double sided clipless pedals like the 2 hole SPDs. Mostly used indoors on the trainer. Cleats have some use (pictures). All cleat mounting hardware included. Batteries have lots of life. Work well. They have bluetooth for easy pairing to your phone (Strava!) and ANT+ (Wahoo, Garmin bike computers and even my Fenix watch).
Good summary: https://www.cyclingweekly.com/reviews/power-meters-bike-components/powertap-p1-pedals