Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. You can get coupon down below.
Link: Banggood product page
Coupon (83.89 USD): Cuponation9
(CouponsFromChina.com tip: 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
Old coupons (from the oldest to the newest): BGDH16, BGAD001, AFfbG10, 7d18f7, BG8123, bGhOnEy10, BG6879, BG6L92, BgcLuBofErtA10, 13f142, BGCuponation10, BG10OFFAFF, BG10OFFAFF1, BGBF20off2, Terence, 8wEbgaInS5, hoNEYbGdeAlS
(there’s a little possibility that old coupon will work)
Price history and price alert
Check out price history chart (for all/most countries) for 6L Alcohol Water Distiller.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).