Basically copy coupon, view price history or create e-mail price alert. Best price?
Weight 50g System Nucleus Camera 30W/8W MIC 4015/-42db Key FPC Key Speaker 8Ω/0.8W Charge Micro USB
Aliexpress
I could not find it on Aliexpress. Click here to search by yourself.
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. I can’t find any active coupons for this product in Banggood.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): 502C6B, e2bcea, TTxBG10, aff7off, PICODICOM, bgssaff9, picodicom, BGaDmITAd, bGpAnDacHeCk, 13f142
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Here is price history (for all/most countries) for LYNWO T8 Smart Watch.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).