Just check coupons out (with price alert and history). Best price?
Charging bin weight About 45g, bluetooth transmission About 15m, Earphone weight About 12g(left and right), Color Black /White /Pink, Model K10, Charging bay battery capacity 400mAh, Earphone single use time about 6.5 hours, Headphone battery capacity 48mAh, Brand KZ, Driver 1BA+1DD drive / 30019 balanced armature unit +10MM dual magnetic dynamic drive(Polymer composite diaphragm), bluetoth version bluetooth 5.2
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. There is one great coupon!
Link: Banggood product page
1. ($53.54): BG1b5830
just apply this code in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGKZSK10, BG0f4fbd, BGBuscape01, BG651551, BGBRPL2, BGHOTSHOP15
(probably won’t work, but you can try them out)
Price history and price alert
Here is price history (for all/most countries) for KZ SK10 1BA 1DD Bluetooth 5.2 Earphones.
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)).