Latest update shows that C50B 1080P 3-Channel Dash Cam costs $35.99 (in Banggood). Price history, coupons and price alert are available on this page. You probably want to know what is the best price?
C50B 1080P 3-Channel Dash Cam Car DVR Infrared Night Vision 360° Rotatable Lens HD IPS Screen Reversing Parking Monitor
Latest coupon and price update (UTC):
Banggood ($35.99)
Banggood warehouse is located in China. Is it expensive? From what I can see this price is higher than average price ($34.49). Only one coupon available!
Link: Banggood product page
Price without coupon: $39.99
1. ($35.99): BGAMMT03
just apply this code in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGa1d130, BGd8ec6b, BGLMQ15, BGSCM11
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Check out price history chart (for all/most countries) for C50B 1080P 3-Channel Dash Cam.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).