I have just checked coupons. The lowest price I could get is $16.99 for Car Charger with Type-C (in Banggood). You can create price alert here, copy coupons and view price history. What is the best price?
Car Charger with Type-C PD65W & 100W Super Fast Charge USB & 3-in-1 Charging 289W Max Power 12V-24V Universal
Latest coupon and price update (UTC):
Banggood ($16.99)
Banggood warehouse is located in China. As you can see I didn’t find any active coupon for this product right now… Well, is it a good price anyway? Well, this price is higher than average price ($13.24)
Link: Banggood product page
Price: $16.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG595ce6, BG641801, BGf79b39, BG94e3ee, BGLMQ15, BGCAR639, BG503a17
(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 Car Charger with Type-C.
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)).