AUTO-VOX has their D2 Pro Dash Camera [amazon.com]
on sale with a code this month. The Final price is $41.21. More than 30% off.
Promotion Code: ET8BI6VU
There are plenty of specs on the page to read over, but it seems like a decent camera overall, and has an overwhelming number of positive reviews. It does have a parking mode, which is great, and includes an odometer. It has a wide-angle camera, so you can see sides. It installs with included suction cups, and comes with a charger.
Free Prime shipping.