$11.53 – Eachine K-Loverleaves 5.8G 5dBi 6 Leaf Clover RC Antenna (Banggood, Aliexpress: Polarization: Right Hand Circular Polarized /RHCP, Frequency: 5.8G, Gain: 5dBi, Connector: RP-SMA /SMA, VSWR: <1.3, Impedance: 50Ω, Radiation: Omni (the best price with coupon)).
I have just checked coupons. The lowest price I could get is $11.53 for Eachine K-Loverleaves 5.8G 5dBi 6 Leaf Clover RC Antenna (in Banggood). Price history, coupons and price alert are available on this page. You probably want to know what is the best price?
Latest price update (UTC time):
Banggood ($11.53)
Banggood warehouse is located in China. So I have checked for active coupons (all category coupons and old ones), but there was no working coupon in Banggood. Well, is it a good price anyway? It looks like it’s a good price (lower than average ($13.32)).
Link: Banggood product page
Price: $11.53
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGEachine10, BGRCEachine, BGToys1, BGRCT10, BGToys8, BGMatt2022, BG589b2e
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Do you need price history chart (for all/most countries) for Eachine K-Loverleaves 5.8G 5dBi 6 Leaf Clover RC Antenna? There we go. The lowest price was: $10.89.
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)).