Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. One coupon is available. Cool!
Link: Banggood product page
Coupon (31.40 USD): BGWRIBAND10
(CouponsFromChina.com tip: apply code in your basket (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, band10, TTxBG10, 2019SPEDM, BG3CSUM, AFfbG10, BGBK15, BGBAK15, BGSS10%SW, bgshOOp10, BGAFF10OFF, BGCuponation10
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
Here is price history (for all/most countries) for CACGO K2 Smartwatch.
Price records source(s): Gearbest, Banggood
Click on image to enlarge.
You can set price alert (for Banggood).