If you're not in a hurry, you can find dash cams on Wish for like 10-15 bucks shipped. https://www.wish.com/search/dash%20cam/product/5c66534e6730fb55ed55615f?&source=search or https://www.wish.com/search/dash%20cam/product/5c21a8a66173582d1f7ec06e?&source=search

I'm using a GoPro knockoff from Amazon that I think was like $30. This one: https://www.amazon.com/gp/product/B01MXXP4EC/ $32 after coupon applied. The sticky pad for mounting sucked ass, so I got a 3M mounting strip that's been holding on for a year now.