A high-performance dash cam is one of those things you hope you never actually need. When you do, though, you will be glad you have the footage to back up your side of the story. Expect to pay around $400 for a reliable dual-camera setup that handles night vision and cloud storage well.
Timing matters here. Watch for sales during major holiday weekends or Prime Day, when these units often drop by 15-20%. Don't rush into the purchase if you are within a few weeks of a known sale event.
Remember that the 18-month intro window is a deadline, not free money. If you have a balance remaining after that period ends, you will start paying interest on the remaining amount.