Buy.com via Rakuten offers the refurbished Garmin Forerunner 405 GPS Heart Rate Monitor, model no. 010-N00658-22, for $86.99 with free shipping. That's $13 under our September mention and the lowest total price we've seen. (It's a current low for a refurb by $4.) It features a GPS receiver, LCD, chest strap, heart rate-based calorie calculation, and alarm clock.
Note, no warranty information is provided.