Auto-Vox via Amazon offers the Auto-Vox Cam 6 License Plate-Mount Reverse Backup Camera for $19.99. Coupon code "COFZ2FH8" cuts that to $15.39. Plus, Prime members receive free shipping. That's a buck under our November mention, a low by $8, and the best price we've seen. It features a 170° wide-angle lens and night vision. Deal ends January 19.