Aliexpress
Click here… to search for UMIDIGI AirBuds U Bluetooth 5.1 Earphones ENC on Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in Hong Kong. I couldn’t find any coupon for this product on latest product update.
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): BG4ea068, BG6fffd9, BGAUDIO, BG9ba0e8, BG6de015, BG1b5830, BGAudio3
(these coupons are old, so probably won’t work)
Price history and price alert
Here is price history (for all/most countries) for UMIDIGI AirBuds U Bluetooth 5.1 Earphones ENC.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).