$21.99 – Screen size 3.76in, Product name Vehicle HUD head-up display, Input signal GPS, Applicable models Universal For Car, Model G9, Compatibility Strong, Screen type LED, Material ABS+PC, Resolution HD, Display function Speeding alarm/driving direction/time/driving distance/driving time/100km acceleration/satellite number/fatigue driving reminder.
Latest update shows that G9 Auto HUD GPS Head Up Display costs $21.99 (in Banggood). Basically copy coupon, view price history or create e-mail price alert. Let’s see what best price is ATM.
Latest coupon and price update (UTC):
Banggood ($21.99)
Banggood warehouse is located in China. I can’t find any active coupons for this product in Banggood. Price? Hmmm, price is higher than average (which is $17.59 right now), so better set price alert down below…
Link: Banggood product page
Price: $21.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/i1u
Old coupons (from the oldest to the newest): BGSCM11, BGCAR639, BGe4e17b, BGAMMT03
(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
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Do you need price history chart (for all/most countries) for G9 Auto HUD GPS Head Up Display? There we go. The lowest price was: $13.39.
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)).