Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. There is one coupon available! Pretty cool, huh?
Link: Banggood product page
Coupon (48.67 USD): 13f142
(CouponsFromChina.com tip: you should apply the coupon 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): 502C6B, e2bcea, TTxBG10, aff7off, DT155, BG3CSUM, PICODICOM, picodicom, BGaDmITAd, bgdt15
(there’s a little possibility that old coupon will work)
Price history and price alert
Price history (for all/most countries) for NO.1 G6 Smartwatch Red is here.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).