$29.99 – that is current price with coupon for TENGOO HV-04A Heating Vest (in Banggood). Price history, coupons and price alert are available on this page. Best price?
TENGOO HV-04A Unisex 4 Places Heating Vest 3-Gears Heated Jackets USB Electric Thermal Clothing Winter Warm Vest Outdoor Heat Coat Clothing – 6XL
Latest coupon and price update (UTC):
Banggood ($29.99)
Banggood warehouse is located in China. Too bad there’s no coupon right now in Banggood. The question is – is it a good price? Maybe there’re no more promotions for this item, because current price is higher than average (which is equal $18.32)
Link: Banggood product page
Price: $29.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Aliexpress
I could not find it on Aliexpress. Click here to search by yourself.
Here are coupons that you can use.
Price history and price alert
Price history (for all/most countries) for TENGOO HV-04A Heating Vest is here.
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)).