Aliexpress
Click here… to search for Xiaomi MRB23 Updated Smart Mi Water Purifier on Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. There is one coupon available! Pretty cool, huh?
Link: Banggood product page
Coupon (290.99 USD): 7bcdf9
(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): BGfaucet, AFfbG10, 502C6B, BGmiwater, BG5258, BG7589, BG7960, BGFG45, bGhOnEy10, BGYJ001, bgshOOp10, BGHWDEALS888, BgoFErTaSchInA10, BGHALLOWEEN, BgcLuBofErtA10, BGCuponation10
(these coupons are old, so probably won’t work)
Price history and price alert
Do you need price history chart (for all/most countries) for Xiaomi MRB23 Updated Smart Mi Water Purifier? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).
Hi does it work with 110v
It seems to work only with 220 V