Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (50.92 USD): BG1111KA
Coupon (50.92 USD): BGBFKA
(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): BGDEMDH207, BGaDmITAd, aff7off, BGDER207, bgchinafest, BGDERKL, 502C6B, BGBFAFF2019, BGCITYADS2019, bGpAnDacHeCk, 2020CNY, BGVDay10%off, BGHOMEAPP, bGhOnEy10, BGAFF7OFF, BGSS10%SW, bgshOOp10, BGHome15%, BGHOMEAPP13, BGRDH207, BGHOMEA13, 13f142, BG10OFFAFF, BGwhielabel, BGYY001, BG10OFFAFF1, BANGGOODSD
(these coupons are old, so probably won’t work)
Price history and price alert
Check out price history chart (for all/most countries) for Deerma DEM-DH207 0.6L Electric Kettle.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).