Aliexpress
Click here… to search for Xigmer Lunar X01 Smart Watch on Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in Hong Kong.
Link: Banggood product page
Coupon (38.22 USD): BGbf11dd
Coupon (38.22 USD): BGc70579
(CouponsFromChina.com tip: apply it 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): BGXIGMER, band10, BGWRIBAND10, BGdd1298, 6GSGIT, BG93eba7
(these coupons are old, so probably won’t work)
Price history and price alert
Price history (for all/most countries) for Xigmer Lunar X01 Smart Watch is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).