Aliexpress
There’re some similar items on Aliexpress in my database. There may be some other items though.
| Image | Product (link) | Price | Coupons |
|---|---|---|---|
 |
BOYA BY-M1 PRO 6m Omnidirectional Condenser Lavalier Microphone | 20.84 USD | – |
 |
BOYA BY-V Professional Wireless Lavalier Microphone | 32.22 USD | Paste $2/2,01 coupon “OFDCDNWH56DX” in the cart |
 |
BOYA BY-MM1 Microphone | 32.37 USD | – |
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. I’m afraid that there’s no working coupon in Banggood.
Link: Banggood product page
Price: -3 USD
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BG2150512, BG21051201, BGAFF10OFF, BGCuponation10, 13f142, BGHONEY2110, BG7b1712, BG34b18f, BG69deb4, BGd0b05d, BG2589f4
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Price history (for all/most countries) for BOYA BY-M1 3.5mm Lapel Microphone is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).