Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. I am tired of searching coupons, but I found one for you…
Link: Banggood product page
Coupon (22.04 USD): BGWINTER1
(CouponsFromChina.com tip: this code has to be applied in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BGd4a813, BG8OFFCOUPON, BGd5c3d2, BGf8f265, TTBLACK5, BG31e333, BGebb574, BG589b2e, BGSPW011
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Here is price history (for all/most countries) for TENGOO Heating Jacket With Hat.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).