Aliexpress
Here are coupons that you can use.
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. China – DYS FPV 5.8G Antenna SMA male (-3 USD)
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (4.36 USD): BGBCBG10
Coupon (4.46 USD): Parts8
Coupon (4.51 USD): aff7off
(CouponsFromChina.com tip: put item in your cart and apply coupon code there after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): rchobbies8, TTxBG10, e2bcea, CFadmitad, f62884, d8f2bb, BGss9%rc, bgssaff9, BGCCOO, BGBCFPV, bgbcfpv
(there’s a little possibility that old coupon will work)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. China – DYS FPV 5.8G Antenna SMA male (-3 USD)
Price history and price alert
Check out price history chart (for all/most countries) for DYS FPV 5.8G Antenna RP-SMA male.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).