Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. Only one coupon available!
Link: Banggood product page
Coupon (43.65 USD): BG1111KA
(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): AFfbG10, BGKT3566, BG222KETTLE, BGCITYADS2019, BGVM106, BGVDay10%off, BGVIML, BGVIOMH, BGHOMEAPP, BGVIMKL, bGhOnEy10, BGSS10%SW, BGVIMK, bgshOOp10, BGHome15%, BGHOMEAPP13, BGHOMEA13, 13f142, BG10OFFAFF, BGwhielabel, BGYY001, BG10OFFAFF1, BANGGOODSD
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Price history (for all/most countries) for Xiaomi VIOMI YM-K1506 1.5L 1800W Electric Kettle is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).