Go down and check coupons out. Remember to check price history if it is available. What is the best price?
Driver Diameter: Ø9mm, Impedance: 16Ω, Sensitivity: 110dB, Frequency Response: 20-350000Hz, Whether with Mic: Optional, Cable Length: 1.2m
Aliexpress
I could not find it 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.
Link: Banggood product page
1. ($21.59): aff7off
2. ($21.59): TTxBG10
paste coupon code in your cart and click Apply 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
Price history and price alert
Price history (for all/most countries) for SGZ-DN1 Earphones is here.
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)).