Hcalory 1500W IP44 Car Engine Preheater [EU] (Banggood, Aliexpress: Auto temperature control: 85°C-130°C, Power: 1500W, Working voltage: 220V 50Hz, Pump lift: ＞90cm, Material: Metal, Uses: Warm air, Color: Sliver (the best price with coupon)).
You can create price alert here, copy coupons and view price history. What is the best price?
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 code price check (UTC time):
Banggood
Banggood warehouse is located in Europe 
. Uhm… There’s no price history (in my database) for this product right now.
Link: Banggood product page
1. ($25.49): BGLMQ15
2. ($26.39): BGSCM11
apply code in your basket (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): BGCarEle5, BG825500, BG845979, BGCAR639
(these coupons are old, so probably won’t work)
Price history and price alert
There is only one database record (it was for $25.49), so you can’t see price history chart.
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)).