Aliexpress
Click here… to search for Bakeey M30 Smartwatch on Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. Well, there is one coupon available right now.
Link: Banggood product page
Coupon (20.99 USD): band10
(CouponsFromChina.com tip: just apply this code 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): 14m30, 15wt, 502C6B, TTxBG10, BGm30e, 2019SPEDM, AFfbG10, BGBK15, 0e7f33, BGBAK15
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Check out price history chart (for all/most countries) for Bakeey M30 Smartwatch.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).