You can create price alert here, copy coupons and view price history. Let’s see what best price is ATM.
Cable Length: about 1.5m, Purpose: Defrosting/Demisting/Heating, Type: A: Front Seat Model B: Back Seat Model, Color: Black/White/Pink, Power: 120W, Material: ABS
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. Coupons for 120W Car Heater Fan? Nope, there’re no coupons in Banggood.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGeaf456, BG00c906, BG589b2e
(these coupons are old, so probably won’t work)
Price history and price alert
Do you need price history chart (for all/most countries) for 120W Car Heater Fan? There we go.
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)).