Newegg has the Transcend DrivePro 100 16GB Full HD Car Video Recorder with Suction Mount and 2.4" LCD Display (TS16GDP100A) for $50 at final checkout + $2 shipping = $52 shipped.
Full HD 1080 recording with F/1.8 aperture for low light conditions. Includes a 16GB Transcend microSDHC Class 10 card, but the microSD slot can support up to 64GB.