Aliexpress
Click here… to search for Xiaomi TOPCREATING DK515S 850W 600ML Tea Pot on Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (104.22 USD): BG10OFFAFF
Coupon (106.80 USD): 7bcdf9
(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): BG15CTR, 10earth, 2019SPEDM, BGss11, bgssaff9, aff7off, BGaDmITAd, 502C6B, BGBFAFF2019, BGCITYADS2019, bGpAnDacHeCk, BGDK515S, BGHOMEAPP, BGTT10, bGhOnEy10, BGSS10%SW, BGHome15%, BGHOMEAPP13, BGHOMEA13
(these coupons are old, so probably won’t work)
Price history and price alert
Price history (for all/most countries) for Xiaomi TOPCREATING DK515S 850W 600ML Tea Pot is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).