ATM you can buy KZ DQS Wired Earphones for $13.99 (in Banggood). Price history, coupons and price alert are available on this page. What is best price?
Latest coupon and price update (UTC):
Color Black, Material Metal+PC, Sensitivity 110dB, Volume Control No, Frequency Response 20-40k Hz, Length 1.25cm, Model DQS, Brand KZ, Drivers DD, Impedance 14Ω, Wearing Type In-ear, Plug Type 0.75mm, Cable Type OFC flat cable, Microphone No/Yes, Plug Type 3.5mm
Banggood ($13.99)
Banggood warehouse is located in China. There are no coupons for this product in Banggood. You probably want to know if this is a good price. IMHO this is a good price, coz it’s lower than average ($15.12)
Link: Banggood product page
Price: $13.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGAudio3, BGAudio9
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Do you need price history chart (for all/most countries) for KZ DQS Wired Earphones? There we go.
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)).