Amazon is offering Up to 50% off Automotive Parts & Accessories. Shipping is free for Prime members or on $25+.
Amazon has the YI 2.7" 1080p HD Wide Angle Dashboard Camera (89006) for $50 - $14 off with coupon 83QF3YF2 = $36 with free shipping. It features a 1920x1080p 60fps high definition image and first-class night vision, 165 ultra wide-angle to reduce blind spots and obtain full 3 lane coverage.
Has good Amazon Reviews.