Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. I have no active coupons for you right now.
Link: Banggood product page
Price: -3 USD
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
Old coupons (from the oldest to the newest): 18BGI8, e2bcea, B12GDS8, BGaDmITAd, BGCITYADS2019, BGBFAFF2019, aff7off, BG9NY, bGpAnDacHeCk, BGAFF10OFF, bGhOnEy10, BGSS10%SW, BGdragonBoat, bgshOOp10, BgoFErTaSchInA10, 13f142
(these coupons are old, so probably won’t work)
Price history and price alert
Here is price history (for all/most countries) for Mini I8 D8-S Keyboard Air Mouse.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).