Auto-Vox via Amazon offers the Auto-Vox Cam 6 License Plate-Mount Reverse Backup Camera for $19.99. Coupon code "HTVYWFN8" cuts that to $15.99. Plus, Prime members receive free shipping. That's tied with our mention from a month ago and the lowest price we could find by $7. It features a 170° wide-angle lens and night vision. Deal ends November 17.