Aliexpress
Click here… to search for QCY T3 TWS Earphones on Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. So I have checked for active coupons (all category coupons and old ones), but there was no working coupon in Banggood.
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): BG20QCY, TTxBG10, aff7off, BGkonimbesinT3, BGT3, BG3CSUM, bgssaff9, AFfbG10, 502C6B, BGCITYADS2019, BGQCYT3CF, BGT3377, BGQCYT3, BGVDay10%off, EARSP11, BGTT10, bGhOnEy10, BGSK801, BGLOAC1, 13f142, Cholldrons04, BGa0b145, BGBuscape01, BG651551, BGBRPL2, BGHOTSHOP15, BG1b5830
(probably won’t work, but you can try them out)
Price history and price alert
Here is price history (for all/most countries) for QCY T3 TWS Earphones.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).