Just check coupons out (with price alert and history). Let’s see what best price is ATM.
Frequency response: 7Hz – 40KHz, Driver unit: 10mm, Impedance: 32ohms, Sensitivity: 104dB
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. One coupon is available. Cool!
Link: Banggood product page
1. ($54.97): BGAlerabatKL
this code has to be applied in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): d4de0b, e2bcea, TTxBG10, aff7off, BG3CSUM, bgssaff9, AFfbG10, affbg10, 502C6B, BGBFAFF2019, BGCITYADS2019, BGVDay10%off, EARSP11, BGAFF10OFF, BGMPB2020, bGhOnEy10, BGSS10%SW, bgshOOp10, 7d18f7, BGELIG0920, BG4BW25, BGLOAC1, 13f142, BGa0b145, BGBuscape01, BG651551, BGBRPL2, BGHOTSHOP15
(you can check these old coupons out, but these probably won’t work)
Other warehouses/versions
This item is available in 3 another warehouse/versions!
1. China – KZ ZS10 Hybrid Earphones With Microphone ($-3)
2. China – KZ ZS10 Earphones Red NoMic ($-3)
3. China – KZ ZS10 Earphones With Mic Blue ($-3)
Price history and price alert
Here is price history (for all/most countries) for KZ ZS10 HiFi Hybrid Earphones Black NoMic.
Price records source(s): Gearbest, 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)).