Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. I found coupon for you. Check this out.
Link: Banggood product page
Coupon (21.79 USD): BGc70579
(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): 16p99, 502C6B, 6p109, band10, TTxBG10, BG116, BG3CSUM, AFfbG10, BGEB116P, BGBK15, BGBAK15, BGAFF10OFF, BG11SHOP, BGCuponation10, BGWRIBAND10, 6GSGIT
(these coupons are old, so probably won’t work)
Price history and price alert
Check out price history chart (for all/most countries) for Bakeey 116 Plus Smart Watch.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).