You can create price alert here, copy coupons and view price history. You probably want to know what is the best price?
Center frequency: 5.8 GHz Bandwidth: 700 MHz (5.3– 6 GHz) Matching: S11 < -20 dB, VSWR < 1.5 (at center frequency) Axial ratio: < 1.3 Antenna gain: 8 dBi Half power beam width: 55° (horizontal and vertical) Radiation efficiency: 83.5% Extension cable length: 80mm size: 60x60x22mm weight: 15g
Aliexpress
There’re some similar (or not) items on Aliexpress
| Image | Product (link) | Price | Coupons |
|---|---|---|---|
 |
Aomway ANT018 5.8G 8dBi RHCP/LHCP FPV Pagoda Antenna SMA/RP-SMA Male for RC Drone | $32.84 | – |
Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($9.33): 13f142
2. ($9.50): Parts8
apply code in your basket (cart) 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
Old coupons (from the oldest to the newest): c51876, f62884, 2019SPEDM, bgssaff9, BGBCFPV, BGBCBG10, 502C6B, BGOTC21, BGBFAFF2019, BGCITYADS2019, bGhOnEy10, BGSS10%SW, bgshOOp10, BGRC902, BGTT10
(there’s a little possibility that old coupon will work)
Price history and price alert
Price history (for all/most countries) for Aomway ANT018 FPV Pagoda Antenna is here.
Price records source(s): Gearbest, 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)).