Aliexpress
Here are coupons that you can use.
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Xiaomi TheONE AIR 61 Keys Smart Electronic Piano [EU] (-3 USD)
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (322.91 USD): BG1d402f
Coupon (337.26 USD): BG00c906
(CouponsFromChina.com tip: apply it 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): BGdragonBoat, BGSS10%SW, bGhOnEy10, bgshOOp10, BGRC902, BgoFErTaSchInA10, BgcLuBofErtA10, BGAFF10OFF, BGTHEONEAIR, BGCuponation10, BGa048bc, 7bcdf9, BGHONEY2110, BG33418e, BANGGOODSD, BG1081b2, 00c906, BG2b86ba, BG423938, BG0b889d, BGa88dbf, ADMITAD2212, Tabby20, BGe7877a, BG9b9a85, BGTheONE61, BGMUSIC10, BG3da0c6
(probably won’t work, but you can try them out)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Xiaomi TheONE AIR 61 Keys Smart Electronic Piano [EU] (-3 USD)
Price history and price alert
Check out price history chart (for all/most countries) for Xiaomi TheONE AIR 61 Keys Smart Electronic Piano.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).