$8.69 – Weight: 0.5g, Usage: RC Model /Wireless AP /Router etc., Length: 65mm, Cable: RG178, Impedance: 50 ohm, Connector: IPEX, Signal Directivity: high-gain omni-directional antenna, Gain: 2dBi, Frequency: 4900 MHz ~5900 MHz, S.W.R: <= 2.5 @5700 MHz ~5900 MHz.
Right now the best price with coupon code for 5 pcs. HGLRC 65mm 5.8G 2dBi U.FL IPEX IPX Omni FPV Antennas is $8.69 (in Banggood). Basically copy coupon, view price history or create e-mail price alert. What is the best price?
Latest price update (UTC time):
Banggood ($8.69)
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. You probably want to know if this is a good price. IMHO this is a good price, coz it’s lower than average ($9.78)
Link: Banggood product page
Price: $8.69
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): Parts8, BGJON8, BGRCParts8, Tabby20, BG1efeb0, MVC8SPRING
(I don’t think these’re gonna work, but you can try ’em out anyway)
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Price history (for all/most countries) for 5 pcs. HGLRC 65mm 5.8G 2dBi U.FL IPEX IPX Omni FPV Antennas is here. The lowest price was: $8.25.
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)).