Aliexpress
There’re some similar items on Aliexpress in my database. There may be some other items though.
| Image | Product (link) | Price | Coupons |
|---|---|---|---|
 |
4x Xiaomi Mijia Bluetooth Thermometer Hygrometer 2 | 18.38 USD | – |
 |
4x Xiaomi Mijia Bluetooth Thermometer Hygrometer 2 | 19.43 USD | – |
 |
4x Xiaomi Mijia Bluetooth Thermometer Hygrometer 2 | 19.59 USD | – |
 |
4x Xiaomi Smart Bluetooth Thermometer Hygrometer LYWSD03MMC | 20.41 USD | Paste $1/19 coupon “TQVIQX659326” in the cart |
 |
Xiaomi Automatic Soap Dispenser Pro MJXSJ04XW | 26.35 USD | – |
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Xiaomi Automatic Soap Dispenser Pro MJXSJ04XW | 28.10 USD | – |
 |
Xiaomi Automatic Soap Dispenser Pro MJXSJ04XW | 45.56 USD | – |
More on Aliexpress… Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (18.99 USD): BGTYOI324
Coupon (18.99 USD): BGPS324
Coupon (25.73 USD): 00c906
(CouponsFromChina.com tip: just apply this code 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): BGMAYTD324, BGwhielabel, BGYFO24, BGISXIAOMI1, BGSPXIAOMI, BGPT324, BGJUTD324, BGdc324, BGXMFO324, BGPDhome53, BG10OFFAFF1, BGTYOC324, BGTYC324, BGISOC324, BGAUC324, BGAUOC324, BGTYOG324, BGSPHOME41, BANGGOODSD, BGUdb55, BGUbf50
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Price history (for all/most countries) for 4x Xiaomi Smart Bluetooth Thermometer Hygrometer LYWSD03MMC is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).