Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (53.99 USD): band10
Coupon (54.99 USD): 7d18f7
Coupon (54.99 USD): bgshOOp10
(CouponsFromChina.com tip: coupon code has to be applied in shop’s 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): 44L7, TTxBG10, BGL7, BGss506, AFfbG10, BGBFAFF2019, BGML7, BGVDay10%off, BGAFF10OFF
(there’s a little possibility that old coupon will work)
Price history and price alert
Here is price history (for all/most countries) for Microwear L7 Smart Watch.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).