Aliexpress
Here are coupons that you can use.
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Foxeer Echo Patch 5.8G 8DBi FPV Antenna [EU] (-3 USD)
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. One coupon is available. Cool!
Link: Banggood product page
Coupon (24.43 USD): Parts8
(CouponsFromChina.com tip: 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
Old coupons (from the oldest to the newest): BGEchoH, BG9NY, 2020CNY, BGVDay10%off, BGOTC21, FBCOUPON1, BGSSF, BGSTUY9, BGKJKK, bGhOnEy10, BGHALLOWEEN, BGTT10, 13f142, BGCuponation10, BGDAVIS
(you can check these old coupons out, but these probably won’t work)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Foxeer Echo Patch 5.8G 8DBi FPV Antenna [EU] (-3 USD)
Price history and price alert
Price history (for all/most countries) for Foxeer Echo Patch 5.8G 8DBi FPV Antenna is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).