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 (22.69 USD): BGHU778
Coupon (22.69 USD): BGHYLS01
Coupon (23.99 USD): BG7HY1
Coupon (32.39 USD): band10
Coupon (32.39 USD): bgshOOp10
(CouponsFromChina.com tip: put item in your cart and apply coupon code there 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): BGIHY01, BGHLG1, AFfbG10, BGNALS019, BGSILS01, BGHYINT, BGNALS01, BGBGLHY, BGAFF10OFF, BGNHaylou, BG20HAY, BGHU725, BGHU745, BGSHY01, BGCZLS01, BGUSLS01, BG287ff7, BGfef3c5, BG6bec23, BG3cc279, BG68f116, BG93f037
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Do you need price history chart (for all/most countries) for Haylou LS01 Smart Watch International? There we go.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).