Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (14.95 USD): BGSCM11
Coupon (15.97 USD): BG589b2e
(CouponsFromChina.com tip: coupon code has to be applied in shop’s 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): BGf1b5e5, BG00c906, ADMITAD2212, 2022ACTIESNL, BG01ccf1, BGa607ae, Terence, Tabby20, BG03485d, BG1efeb0, BGecface, MVC8SPRING, 8BGwbg2204, BGAUTO22, BGdd5c68, BGdcbfa8, BGfd33ae, Cuponation9, BGSCM75
(there’s a little possibility that old coupon will work)
Price history and price alert
Do you need price history chart (for all/most countries) for AM01 Alcohol Tester? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).