Northwest-Outdoor via eBay offers the factory-refurbished Garmin Forerunner 910XT GPS Sport Watch, model no. 010-00741-20, for $139.95 with free shipping. That's the lowest total price we could find for a refurb by $10. Designed for running, cycling, swimming, and other sports, this GPS watch can track your position, distance, elevation, and pace. It features a heart rate monitor and water resistance to 165 feet. A 1-year Garmin warranty applies.