I just got myself a new car (a Subaru Forester) and I’ve been interested for a while in getting a dash cam. That’s the cameras you install inside the car to keep records of what’s happened on the street you’ve driven on. I am a fairly polite and safe driver, and if anything happens, it benefits me if I have a video showing what went on.
Amazon has hundreds of different models of the kind. They come with all sorts of functions, but none of them seems to combine them all. For that, I had to go to Chinavasion, a site that aggregates gadgets made in China and has them drop-shipped to consumers. You can get a volume discount, but there is typically no minimum sale.
Best of all, they allow PayPal, which makes me feel better. I am not too happy about giving a company an ocean away my credit card information (regardless of the ocean), and this way I can monitor more safely what happens.
Aside from an astonishing number of cheap Android gadgets and cell phones, security cameras and solar chargers, and all the panoply of things you can get, there are mirror cams to be found on Chinavasion. Those are like dash cams, but they are built into a rear view mirror that replaces the original one.