Basically copy coupon, view price history or create e-mail price alert. What is the best price?
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Operating frequency: 5.8GHz, Match: Return loss (S11) <-20 dB, standing wave ratio (VSWR) <1.15 (center frequency), Gain: 2dbi, Interface type: SMA Male/ Female (Optional), Item name: FPV Antenna, Axial Ratio: <1.3, Bandwidth range: 500MHz (5.5 - 6.0 GHz), Radiation efficiency: 95%, Brand: iFlight
Banggood
Banggood warehouse is located in China. I can’t find any active coupons for this product in Banggood.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGiFlight, Parts8, bGhOnEy10, BGdragonBoat, bgshOOp10, BGRC902, BG11SHOP, BGAFF7OFF, 13f142, BGCuponation10, BGDAVIS, 00c906, BGGAL8, BGJON8, BGRCParts8, Tabby20, BG1efeb0, 8Couponsde, MVC8SPRING, 8BGwbg2204, tRaDetRaCKeR, 8wEbgaInS5, pROMo8cuPoN, BG8RCToy, BGRCT10, BGJUNEGSG9, TTSUMMER8, Cuponation9, BGToys8, BGMatt2022, BG589b2e
(I don’t think these’re gonna work, but you can try ’em out anyway)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – iFlight 15CM 5.8G 2dBi Pagoda FPV Antenna [EU] ($-3)
Price history and price alert
Here is price history (for all/most countries) for iFlight 15CM 5.8G 2dBi Pagoda FPV Antenna.
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)).