Hypermicrosystems via eBay offers the refurbished Cobra 1080p Dash Cam for $49.99 with free shipping. That's $80 under the the lowest price we could find for a new unit, although it was $5 less in April. It features a 160° field of vision, 1080p recording, auto-save on impact, and Bluetooth.

Note: a 90-day warranty applies, although it's unclear who provides this.