Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. Only one coupon available!
Link: Banggood product page
Coupon (37.79 USD): band10
(CouponsFromChina.com tip: paste coupon code in your cart and click Apply 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): 34hr, 33hr, 27hr, 502C6B, TTxBG10, zeblaze10, 2019SPEDM, BG3CSUM, AFfbG10, BGZeblaze10, BGBFAFF2019, BGVDay10%off, BGZV3HR, BGBGAFF10OFF, BGSS10%SW
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Do you need price history chart (for all/most countries) for Zeblaze VIBE 3 HR Smartwatch Black? There we go.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).