Aliexpress
Click here… to search for Haylou T15 Bluetooth 5.0 Earphones on Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon ($42.20): BGBRPL2
Coupon ($42.20): BGHOTSHOP15
(CouponsFromChina.com tip: you should apply the coupon 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): AFfbG10, BGT1599, BGVDay10%off, EARSP11, bGhOnEy10, BG20HAY, BGITHAYLOU, BGT15011, bgshOOp10, BGELIG0920, BG11SHOP, HAYLOU15, BGLOAC1, 13f142, BGa0b145, BGBuscape01
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
Check out price history chart (for all/most countries) for Haylou T15 Bluetooth 5.0 Earphones.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).